aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Virtio Block Device |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2007 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Anthony Liguori <aliguori@us.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
| 11 | * |
| 12 | */ |
| 13 | |
Peter Maydell | 80c71a2 | 2016-01-18 18:01:42 +0000 | [diff] [blame] | 14 | #include "qemu/osdep.h" |
Stefan Hajnoczi | 433fcea | 2023-09-13 16:00:43 -0400 | [diff] [blame] | 15 | #include "qemu/defer-call.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 16 | #include "qapi/error.h" |
Fam Zheng | 827805a | 2014-06-11 12:11:48 +0800 | [diff] [blame] | 17 | #include "qemu/iov.h" |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 18 | #include "qemu/module.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 19 | #include "qemu/error-report.h" |
Sergio Lopez | 9b92fbc | 2019-09-16 13:24:12 +0200 | [diff] [blame] | 20 | #include "qemu/main-loop.h" |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 21 | #include "block/block_int.h" |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 22 | #include "trace.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 23 | #include "hw/block/block.h" |
Markus Armbruster | a27bd6c | 2019-08-12 07:23:51 +0200 | [diff] [blame] | 24 | #include "hw/qdev-properties.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 25 | #include "sysemu/blockdev.h" |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 26 | #include "sysemu/block-ram-registrar.h" |
Markus Armbruster | 2f780b6 | 2019-08-12 07:23:58 +0200 | [diff] [blame] | 27 | #include "sysemu/sysemu.h" |
Markus Armbruster | 54d3123 | 2019-08-12 07:23:59 +0200 | [diff] [blame] | 28 | #include "sysemu/runstate.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 29 | #include "hw/virtio/virtio-blk.h" |
Fam Zheng | 52b53c0 | 2014-09-10 14:17:51 +0800 | [diff] [blame] | 30 | #include "dataplane/virtio-blk.h" |
Paolo Bonzini | 08e2c9f | 2017-08-22 09:23:55 +0200 | [diff] [blame] | 31 | #include "scsi/constants.h" |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 32 | #ifdef __linux__ |
| 33 | # include <scsi/sg.h> |
| 34 | #endif |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 35 | #include "hw/virtio/virtio-bus.h" |
Markus Armbruster | ca77ee2 | 2019-08-12 07:23:39 +0200 | [diff] [blame] | 36 | #include "migration/qemu-file-types.h" |
Rusty Russell | 783d189 | 2014-06-24 19:43:44 +0200 | [diff] [blame] | 37 | #include "hw/virtio/virtio-access.h" |
Daniil Tatianin | d9cf55a | 2022-09-06 10:31:08 +0300 | [diff] [blame] | 38 | #include "hw/virtio/virtio-blk-common.h" |
Hiroki Narukawa | 4c41c69 | 2022-02-14 20:53:02 +0900 | [diff] [blame] | 39 | #include "qemu/coroutine.h" |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 40 | |
Greg Kurz | d14dde5 | 2016-09-30 17:12:50 +0200 | [diff] [blame] | 41 | static void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq, |
| 42 | VirtIOBlockReq *req) |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 43 | { |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 44 | req->dev = s; |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 45 | req->vq = vq; |
Stefan Hajnoczi | 869d66a | 2014-07-09 10:05:48 +0200 | [diff] [blame] | 46 | req->qiov.size = 0; |
Paolo Bonzini | 2a6cdd6 | 2015-04-02 19:50:44 +0200 | [diff] [blame] | 47 | req->in_len = 0; |
Stefan Hajnoczi | 869d66a | 2014-07-09 10:05:48 +0200 | [diff] [blame] | 48 | req->next = NULL; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 49 | req->mr_next = NULL; |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 50 | } |
| 51 | |
Greg Kurz | d14dde5 | 2016-09-30 17:12:50 +0200 | [diff] [blame] | 52 | static void virtio_blk_free_request(VirtIOBlockReq *req) |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 53 | { |
Fam Zheng | 1d29b5b | 2017-02-07 21:27:22 +0800 | [diff] [blame] | 54 | g_free(req); |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 55 | } |
| 56 | |
Paolo Bonzini | 03de2f5 | 2016-02-14 18:17:09 +0100 | [diff] [blame] | 57 | static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 58 | { |
| 59 | VirtIOBlock *s = req->dev; |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 60 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 61 | |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 62 | trace_virtio_blk_req_complete(vdev, req, status); |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 63 | |
Aurelien Jarno | 92e3c2a | 2011-01-25 11:55:14 +0100 | [diff] [blame] | 64 | stb_p(&req->in->status, status); |
Stefan Hajnoczi | 7bd04a0 | 2020-09-17 10:44:54 +0100 | [diff] [blame] | 65 | iov_discard_undo(&req->inhdr_undo); |
| 66 | iov_discard_undo(&req->outhdr_undo); |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 67 | virtqueue_push(req->vq, &req->elem, req->in_len); |
Paolo Bonzini | eb41cf7 | 2016-04-06 12:16:23 +0200 | [diff] [blame] | 68 | if (s->dataplane_started && !s->dataplane_disabled) { |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 69 | virtio_blk_data_plane_notify(s->dataplane, req->vq); |
Paolo Bonzini | 03de2f5 | 2016-02-14 18:17:09 +0100 | [diff] [blame] | 70 | } else { |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 71 | virtio_notify(vdev, req->vq); |
Paolo Bonzini | 03de2f5 | 2016-02-14 18:17:09 +0100 | [diff] [blame] | 72 | } |
Fam Zheng | bf4bd46 | 2014-06-17 14:32:06 +0800 | [diff] [blame] | 73 | } |
| 74 | |
Kevin Wolf | f35d68f | 2009-11-27 13:25:39 +0100 | [diff] [blame] | 75 | static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, |
Stefano Garzarella | 00f639f | 2019-02-21 11:33:05 +0100 | [diff] [blame] | 76 | bool is_read, bool acct_failed) |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 77 | { |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 78 | VirtIOBlock *s = req->dev; |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 79 | BlockErrorAction action = blk_get_error_action(s->blk, is_read, error); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 80 | |
Wenchao Xia | a589569 | 2014-06-18 08:43:30 +0200 | [diff] [blame] | 81 | if (action == BLOCK_ERROR_ACTION_STOP) { |
Fam Zheng | 466138d | 2015-11-23 08:41:20 +0800 | [diff] [blame] | 82 | /* Break the link as the next request is going to be parsed from the |
| 83 | * ring again. Otherwise we may end up doing a double completion! */ |
| 84 | req->mr_next = NULL; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 85 | req->next = s->rq; |
| 86 | s->rq = req; |
Wenchao Xia | a589569 | 2014-06-18 08:43:30 +0200 | [diff] [blame] | 87 | } else if (action == BLOCK_ERROR_ACTION_REPORT) { |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 88 | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
Stefano Garzarella | 00f639f | 2019-02-21 11:33:05 +0100 | [diff] [blame] | 89 | if (acct_failed) { |
| 90 | block_acct_failed(blk_get_stats(s->blk), &req->acct); |
| 91 | } |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 92 | virtio_blk_free_request(req); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 93 | } |
| 94 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 95 | blk_error_action(s->blk, action, is_read, error); |
Wenchao Xia | a589569 | 2014-06-18 08:43:30 +0200 | [diff] [blame] | 96 | return action != BLOCK_ERROR_ACTION_IGNORE; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 97 | } |
| 98 | |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 99 | static void virtio_blk_rw_complete(void *opaque, int ret) |
| 100 | { |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 101 | VirtIOBlockReq *next = opaque; |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 102 | VirtIOBlock *s = next->dev; |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 103 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 104 | |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 105 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 106 | while (next) { |
| 107 | VirtIOBlockReq *req = next; |
| 108 | next = req->mr_next; |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 109 | trace_virtio_blk_rw_complete(vdev, req, ret); |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 110 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 111 | if (req->qiov.nalloc != -1) { |
Dongli Zhang | e61809e | 2018-11-06 12:52:32 +0800 | [diff] [blame] | 112 | /* If nalloc is != -1 req->qiov is a local copy of the original |
Yaowei Bai | 9bb192a | 2018-07-28 13:18:44 +0800 | [diff] [blame] | 113 | * external iovec. It was allocated in submit_requests to be |
| 114 | * able to merge requests. */ |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 115 | qemu_iovec_destroy(&req->qiov); |
| 116 | } |
| 117 | |
| 118 | if (ret) { |
Anastasiia Rusakova | bf4069f | 2019-03-07 18:19:25 +0200 | [diff] [blame] | 119 | int p = virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 120 | bool is_read = !(p & VIRTIO_BLK_T_OUT); |
Paolo Bonzini | 2a6cdd6 | 2015-04-02 19:50:44 +0200 | [diff] [blame] | 121 | /* Note that memory may be dirtied on read failure. If the |
| 122 | * virtio request is not completed here, as is the case for |
| 123 | * BLOCK_ERROR_ACTION_STOP, the memory may not be copied |
| 124 | * correctly during live migration. While this is ugly, |
| 125 | * it is acceptable because the device is free to write to |
| 126 | * the memory until the request is completed (which will |
| 127 | * happen on the other side of the migration). |
| 128 | */ |
Stefano Garzarella | 00f639f | 2019-02-21 11:33:05 +0100 | [diff] [blame] | 129 | if (virtio_blk_handle_rw_error(req, -ret, is_read, true)) { |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 130 | continue; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
Anastasiia Rusakova | bf4069f | 2019-03-07 18:19:25 +0200 | [diff] [blame] | 135 | block_acct_done(blk_get_stats(s->blk), &req->acct); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 136 | virtio_blk_free_request(req); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 137 | } |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 138 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 139 | } |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 140 | |
Christoph Hellwig | aa659be | 2009-09-04 19:02:23 +0200 | [diff] [blame] | 141 | static void virtio_blk_flush_complete(void *opaque, int ret) |
| 142 | { |
| 143 | VirtIOBlockReq *req = opaque; |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 144 | VirtIOBlock *s = req->dev; |
Christoph Hellwig | aa659be | 2009-09-04 19:02:23 +0200 | [diff] [blame] | 145 | |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 146 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
Kevin Wolf | 8c269b5 | 2010-10-20 13:17:30 +0200 | [diff] [blame] | 147 | if (ret) { |
Stefano Garzarella | 00f639f | 2019-02-21 11:33:05 +0100 | [diff] [blame] | 148 | if (virtio_blk_handle_rw_error(req, -ret, 0, true)) { |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 149 | goto out; |
Kevin Wolf | 8c269b5 | 2010-10-20 13:17:30 +0200 | [diff] [blame] | 150 | } |
| 151 | } |
| 152 | |
| 153 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 154 | block_acct_done(blk_get_stats(s->blk), &req->acct); |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 155 | virtio_blk_free_request(req); |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 156 | |
| 157 | out: |
| 158 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 161 | static void virtio_blk_discard_write_zeroes_complete(void *opaque, int ret) |
| 162 | { |
| 163 | VirtIOBlockReq *req = opaque; |
| 164 | VirtIOBlock *s = req->dev; |
| 165 | bool is_write_zeroes = (virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type) & |
| 166 | ~VIRTIO_BLK_T_BARRIER) == VIRTIO_BLK_T_WRITE_ZEROES; |
| 167 | |
| 168 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
| 169 | if (ret) { |
| 170 | if (virtio_blk_handle_rw_error(req, -ret, false, is_write_zeroes)) { |
| 171 | goto out; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
| 176 | if (is_write_zeroes) { |
| 177 | block_acct_done(blk_get_stats(s->blk), &req->acct); |
| 178 | } |
| 179 | virtio_blk_free_request(req); |
| 180 | |
| 181 | out: |
| 182 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
| 183 | } |
| 184 | |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 185 | #ifdef __linux__ |
| 186 | |
| 187 | typedef struct { |
| 188 | VirtIOBlockReq *req; |
| 189 | struct sg_io_hdr hdr; |
| 190 | } VirtIOBlockIoctlReq; |
| 191 | |
| 192 | static void virtio_blk_ioctl_complete(void *opaque, int status) |
| 193 | { |
| 194 | VirtIOBlockIoctlReq *ioctl_req = opaque; |
| 195 | VirtIOBlockReq *req = ioctl_req->req; |
Paolo Bonzini | 9d45665 | 2017-02-13 14:52:30 +0100 | [diff] [blame] | 196 | VirtIOBlock *s = req->dev; |
| 197 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 198 | struct virtio_scsi_inhdr *scsi; |
| 199 | struct sg_io_hdr *hdr; |
| 200 | |
| 201 | scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; |
| 202 | |
| 203 | if (status) { |
| 204 | status = VIRTIO_BLK_S_UNSUPP; |
| 205 | virtio_stl_p(vdev, &scsi->errors, 255); |
| 206 | goto out; |
| 207 | } |
| 208 | |
| 209 | hdr = &ioctl_req->hdr; |
| 210 | /* |
| 211 | * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) |
| 212 | * clear the masked_status field [hence status gets cleared too, see |
| 213 | * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED |
| 214 | * status has occurred. However they do set DRIVER_SENSE in driver_status |
| 215 | * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. |
| 216 | */ |
| 217 | if (hdr->status == 0 && hdr->sb_len_wr > 0) { |
| 218 | hdr->status = CHECK_CONDITION; |
| 219 | } |
| 220 | |
| 221 | virtio_stl_p(vdev, &scsi->errors, |
| 222 | hdr->status | (hdr->msg_status << 8) | |
| 223 | (hdr->host_status << 16) | (hdr->driver_status << 24)); |
| 224 | virtio_stl_p(vdev, &scsi->residual, hdr->resid); |
| 225 | virtio_stl_p(vdev, &scsi->sense_len, hdr->sb_len_wr); |
| 226 | virtio_stl_p(vdev, &scsi->data_len, hdr->dxfer_len); |
| 227 | |
| 228 | out: |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 229 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 230 | virtio_blk_req_complete(req, status); |
| 231 | virtio_blk_free_request(req); |
Paolo Bonzini | b9e413d | 2017-02-13 14:52:32 +0100 | [diff] [blame] | 232 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 233 | g_free(ioctl_req); |
| 234 | } |
| 235 | |
| 236 | #endif |
| 237 | |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 238 | static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s, VirtQueue *vq) |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 239 | { |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 240 | VirtIOBlockReq *req = virtqueue_pop(vq, sizeof(VirtIOBlockReq)); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 241 | |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 242 | if (req) { |
Stefan Hajnoczi | edaffd9 | 2016-06-21 13:13:13 +0100 | [diff] [blame] | 243 | virtio_blk_init_request(s, vq, req); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 244 | } |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 245 | return req; |
| 246 | } |
| 247 | |
Fam Zheng | 75344fa | 2015-01-20 11:28:46 +0800 | [diff] [blame] | 248 | static int virtio_blk_handle_scsi_req(VirtIOBlockReq *req) |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 249 | { |
Stefan Weil | 47ce9ef | 2012-05-22 23:23:32 +0200 | [diff] [blame] | 250 | int status = VIRTIO_BLK_S_OK; |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 251 | struct virtio_scsi_inhdr *scsi = NULL; |
Fam Zheng | 75344fa | 2015-01-20 11:28:46 +0800 | [diff] [blame] | 252 | VirtIOBlock *blk = req->dev; |
Anastasiia Rusakova | bf4069f | 2019-03-07 18:19:25 +0200 | [diff] [blame] | 253 | VirtIODevice *vdev = VIRTIO_DEVICE(blk); |
| 254 | VirtQueueElement *elem = &req->elem; |
Rusty Russell | 783d189 | 2014-06-24 19:43:44 +0200 | [diff] [blame] | 255 | |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 256 | #ifdef __linux__ |
| 257 | int i; |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 258 | VirtIOBlockIoctlReq *ioctl_req; |
Fam Zheng | a209f46 | 2015-02-17 17:55:53 +0800 | [diff] [blame] | 259 | BlockAIOCB *acb; |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 260 | #endif |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 261 | |
| 262 | /* |
| 263 | * We require at least one output segment each for the virtio_blk_outhdr |
| 264 | * and the SCSI command block. |
| 265 | * |
| 266 | * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr |
| 267 | * and the sense buffer pointer in the input segments. |
| 268 | */ |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 269 | if (elem->out_num < 2 || elem->in_num < 3) { |
| 270 | status = VIRTIO_BLK_S_IOERR; |
| 271 | goto fail; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | /* |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 275 | * The scsi inhdr is placed in the second-to-last input segment, just |
| 276 | * before the regular inhdr. |
| 277 | */ |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 278 | scsi = (void *)elem->in_sg[elem->in_num - 2].iov_base; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 279 | |
Stefano Garzarella | bbe8bd4 | 2019-02-21 11:33:06 +0100 | [diff] [blame] | 280 | if (!virtio_has_feature(blk->host_features, VIRTIO_BLK_F_SCSI)) { |
Paolo Bonzini | f34e73c | 2012-05-16 12:54:03 +0200 | [diff] [blame] | 281 | status = VIRTIO_BLK_S_UNSUPP; |
| 282 | goto fail; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * No support for bidirection commands yet. |
| 287 | */ |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 288 | if (elem->out_num > 2 && elem->in_num > 3) { |
Paolo Bonzini | f34e73c | 2012-05-16 12:54:03 +0200 | [diff] [blame] | 289 | status = VIRTIO_BLK_S_UNSUPP; |
| 290 | goto fail; |
| 291 | } |
| 292 | |
| 293 | #ifdef __linux__ |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 294 | ioctl_req = g_new0(VirtIOBlockIoctlReq, 1); |
| 295 | ioctl_req->req = req; |
| 296 | ioctl_req->hdr.interface_id = 'S'; |
| 297 | ioctl_req->hdr.cmd_len = elem->out_sg[1].iov_len; |
| 298 | ioctl_req->hdr.cmdp = elem->out_sg[1].iov_base; |
| 299 | ioctl_req->hdr.dxfer_len = 0; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 300 | |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 301 | if (elem->out_num > 2) { |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 302 | /* |
| 303 | * If there are more than the minimally required 2 output segments |
| 304 | * there is write payload starting from the third iovec. |
| 305 | */ |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 306 | ioctl_req->hdr.dxfer_direction = SG_DXFER_TO_DEV; |
| 307 | ioctl_req->hdr.iovec_count = elem->out_num - 2; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 308 | |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 309 | for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { |
| 310 | ioctl_req->hdr.dxfer_len += elem->out_sg[i + 2].iov_len; |
| 311 | } |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 312 | |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 313 | ioctl_req->hdr.dxferp = elem->out_sg + 2; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 314 | |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 315 | } else if (elem->in_num > 3) { |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 316 | /* |
| 317 | * If we have more than 3 input segments the guest wants to actually |
| 318 | * read data. |
| 319 | */ |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 320 | ioctl_req->hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| 321 | ioctl_req->hdr.iovec_count = elem->in_num - 3; |
| 322 | for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { |
| 323 | ioctl_req->hdr.dxfer_len += elem->in_sg[i].iov_len; |
| 324 | } |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 325 | |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 326 | ioctl_req->hdr.dxferp = elem->in_sg; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 327 | } else { |
| 328 | /* |
| 329 | * Some SCSI commands don't actually transfer any data. |
| 330 | */ |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 331 | ioctl_req->hdr.dxfer_direction = SG_DXFER_NONE; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 332 | } |
| 333 | |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 334 | ioctl_req->hdr.sbp = elem->in_sg[elem->in_num - 3].iov_base; |
| 335 | ioctl_req->hdr.mx_sb_len = elem->in_sg[elem->in_num - 3].iov_len; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 336 | |
Fam Zheng | a209f46 | 2015-02-17 17:55:53 +0800 | [diff] [blame] | 337 | acb = blk_aio_ioctl(blk->blk, SG_IO, &ioctl_req->hdr, |
| 338 | virtio_blk_ioctl_complete, ioctl_req); |
| 339 | if (!acb) { |
| 340 | g_free(ioctl_req); |
| 341 | status = VIRTIO_BLK_S_UNSUPP; |
| 342 | goto fail; |
| 343 | } |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 344 | return -EINPROGRESS; |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 345 | #else |
Paolo Bonzini | f34e73c | 2012-05-16 12:54:03 +0200 | [diff] [blame] | 346 | abort(); |
| 347 | #endif |
| 348 | |
| 349 | fail: |
| 350 | /* Just put anything nonzero so that the ioctl fails in the guest. */ |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 351 | if (scsi) { |
Rusty Russell | 783d189 | 2014-06-24 19:43:44 +0200 | [diff] [blame] | 352 | virtio_stl_p(vdev, &scsi->errors, 255); |
Fam Zheng | 5a05cbe | 2014-05-22 16:22:42 +0800 | [diff] [blame] | 353 | } |
| 354 | return status; |
| 355 | } |
| 356 | |
| 357 | static void virtio_blk_handle_scsi(VirtIOBlockReq *req) |
| 358 | { |
| 359 | int status; |
| 360 | |
Fam Zheng | 75344fa | 2015-01-20 11:28:46 +0800 | [diff] [blame] | 361 | status = virtio_blk_handle_scsi_req(req); |
Fam Zheng | 1dc936a | 2015-01-20 11:28:47 +0800 | [diff] [blame] | 362 | if (status != -EINPROGRESS) { |
| 363 | virtio_blk_req_complete(req, status); |
| 364 | virtio_blk_free_request(req); |
| 365 | } |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 366 | } |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 367 | |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 368 | static inline void submit_requests(VirtIOBlock *s, MultiReqBuffer *mrb, |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 369 | int start, int num_reqs, int niov) |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 370 | { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 371 | BlockBackend *blk = s->blk; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 372 | QEMUIOVector *qiov = &mrb->reqs[start]->qiov; |
| 373 | int64_t sector_num = mrb->reqs[start]->sector_num; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 374 | bool is_write = mrb->is_write; |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 375 | BdrvRequestFlags flags = 0; |
Christoph Hellwig | 87b245d | 2009-08-13 16:49:56 +0200 | [diff] [blame] | 376 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 377 | if (num_reqs > 1) { |
| 378 | int i; |
| 379 | struct iovec *tmp_iov = qiov->iov; |
| 380 | int tmp_niov = qiov->niov; |
| 381 | |
| 382 | /* mrb->reqs[start]->qiov was initialized from external so we can't |
Eric Blake | b5772fd | 2016-05-06 10:26:33 -0600 | [diff] [blame] | 383 | * modify it here. We need to initialize it locally and then add the |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 384 | * external iovecs. */ |
| 385 | qemu_iovec_init(qiov, niov); |
| 386 | |
| 387 | for (i = 0; i < tmp_niov; i++) { |
| 388 | qemu_iovec_add(qiov, tmp_iov[i].iov_base, tmp_iov[i].iov_len); |
| 389 | } |
| 390 | |
| 391 | for (i = start + 1; i < start + num_reqs; i++) { |
| 392 | qemu_iovec_concat(qiov, &mrb->reqs[i]->qiov, 0, |
| 393 | mrb->reqs[i]->qiov.size); |
| 394 | mrb->reqs[i - 1]->mr_next = mrb->reqs[i]; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 395 | } |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 396 | |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 397 | trace_virtio_blk_submit_multireq(VIRTIO_DEVICE(mrb->reqs[start]->dev), |
| 398 | mrb, start, num_reqs, |
Eric Blake | b5772fd | 2016-05-06 10:26:33 -0600 | [diff] [blame] | 399 | sector_num << BDRV_SECTOR_BITS, |
| 400 | qiov->size, is_write); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 401 | block_acct_merge_done(blk_get_stats(blk), |
| 402 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ, |
| 403 | num_reqs - 1); |
| 404 | } |
| 405 | |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 406 | if (blk_ram_registrar_ok(&s->blk_ram_registrar)) { |
| 407 | flags |= BDRV_REQ_REGISTERED_BUF; |
| 408 | } |
| 409 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 410 | if (is_write) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 411 | blk_aio_pwritev(blk, sector_num << BDRV_SECTOR_BITS, qiov, |
| 412 | flags, virtio_blk_rw_complete, |
| 413 | mrb->reqs[start]); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 414 | } else { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 415 | blk_aio_preadv(blk, sector_num << BDRV_SECTOR_BITS, qiov, |
| 416 | flags, virtio_blk_rw_complete, |
| 417 | mrb->reqs[start]); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 418 | } |
| 419 | } |
| 420 | |
| 421 | static int multireq_compare(const void *a, const void *b) |
| 422 | { |
| 423 | const VirtIOBlockReq *req1 = *(VirtIOBlockReq **)a, |
| 424 | *req2 = *(VirtIOBlockReq **)b; |
| 425 | |
| 426 | /* |
| 427 | * Note that we can't simply subtract sector_num1 from sector_num2 |
| 428 | * here as that could overflow the return value. |
| 429 | */ |
| 430 | if (req1->sector_num > req2->sector_num) { |
| 431 | return 1; |
| 432 | } else if (req1->sector_num < req2->sector_num) { |
| 433 | return -1; |
| 434 | } else { |
| 435 | return 0; |
| 436 | } |
| 437 | } |
| 438 | |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 439 | static void virtio_blk_submit_multireq(VirtIOBlock *s, MultiReqBuffer *mrb) |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 440 | { |
| 441 | int i = 0, start = 0, num_reqs = 0, niov = 0, nb_sectors = 0; |
Eric Blake | 5def6b8 | 2016-06-23 16:37:19 -0600 | [diff] [blame] | 442 | uint32_t max_transfer; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 443 | int64_t sector_num = 0; |
| 444 | |
| 445 | if (mrb->num_reqs == 1) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 446 | submit_requests(s, mrb, 0, 1, -1); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 447 | mrb->num_reqs = 0; |
Christoph Hellwig | c20fd87 | 2010-06-08 18:26:07 +0200 | [diff] [blame] | 448 | return; |
| 449 | } |
| 450 | |
Eric Blake | 5def6b8 | 2016-06-23 16:37:19 -0600 | [diff] [blame] | 451 | max_transfer = blk_get_max_transfer(mrb->reqs[0]->dev->blk); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 452 | |
| 453 | qsort(mrb->reqs, mrb->num_reqs, sizeof(*mrb->reqs), |
| 454 | &multireq_compare); |
| 455 | |
| 456 | for (i = 0; i < mrb->num_reqs; i++) { |
| 457 | VirtIOBlockReq *req = mrb->reqs[i]; |
| 458 | if (num_reqs > 0) { |
Gonglei | 49cffbc | 2015-11-11 09:59:26 +0800 | [diff] [blame] | 459 | /* |
| 460 | * NOTE: We cannot merge the requests in below situations: |
| 461 | * 1. requests are not sequential |
| 462 | * 2. merge would exceed maximum number of IOVs |
| 463 | * 3. merge would exceed maximum transfer length of backend device |
| 464 | */ |
| 465 | if (sector_num + nb_sectors != req->sector_num || |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 466 | niov > blk_get_max_iov(s->blk) - req->qiov.niov || |
Eric Blake | 5def6b8 | 2016-06-23 16:37:19 -0600 | [diff] [blame] | 467 | req->qiov.size > max_transfer || |
| 468 | nb_sectors > (max_transfer - |
| 469 | req->qiov.size) / BDRV_SECTOR_SIZE) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 470 | submit_requests(s, mrb, start, num_reqs, niov); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 471 | num_reqs = 0; |
Kevin Wolf | 91553dc | 2009-09-09 17:53:38 +0200 | [diff] [blame] | 472 | } |
| 473 | } |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 474 | |
| 475 | if (num_reqs == 0) { |
| 476 | sector_num = req->sector_num; |
| 477 | nb_sectors = niov = 0; |
| 478 | start = i; |
| 479 | } |
| 480 | |
| 481 | nb_sectors += req->qiov.size / BDRV_SECTOR_SIZE; |
| 482 | niov += req->qiov.niov; |
| 483 | num_reqs++; |
Christoph Hellwig | 87b245d | 2009-08-13 16:49:56 +0200 | [diff] [blame] | 484 | } |
Christoph Hellwig | c20fd87 | 2010-06-08 18:26:07 +0200 | [diff] [blame] | 485 | |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 486 | submit_requests(s, mrb, start, num_reqs, niov); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 487 | mrb->num_reqs = 0; |
aliguori | d28a1b6 | 2009-03-28 17:46:14 +0000 | [diff] [blame] | 488 | } |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 489 | |
Christoph Hellwig | c20fd87 | 2010-06-08 18:26:07 +0200 | [diff] [blame] | 490 | static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
Christoph Hellwig | aa659be | 2009-09-04 19:02:23 +0200 | [diff] [blame] | 491 | { |
Anastasiia Rusakova | bf4069f | 2019-03-07 18:19:25 +0200 | [diff] [blame] | 492 | VirtIOBlock *s = req->dev; |
| 493 | |
| 494 | block_acct_start(blk_get_stats(s->blk), &req->acct, 0, |
Benoît Canet | 5366d0c | 2014-09-05 15:46:18 +0200 | [diff] [blame] | 495 | BLOCK_ACCT_FLUSH); |
Christoph Hellwig | a597e79 | 2011-08-25 08:26:01 +0200 | [diff] [blame] | 496 | |
Christoph Hellwig | 618fbb8 | 2010-05-19 12:40:09 +0200 | [diff] [blame] | 497 | /* |
| 498 | * Make sure all outstanding writes are posted to the backing device. |
| 499 | */ |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 500 | if (mrb->is_write && mrb->num_reqs > 0) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 501 | virtio_blk_submit_multireq(s, mrb); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 502 | } |
Anastasiia Rusakova | bf4069f | 2019-03-07 18:19:25 +0200 | [diff] [blame] | 503 | blk_aio_flush(s->blk, virtio_blk_flush_complete, req); |
Christoph Hellwig | aa659be | 2009-09-04 19:02:23 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Markus Armbruster | d0e1437 | 2014-07-09 19:07:29 +0200 | [diff] [blame] | 506 | static bool virtio_blk_sect_range_ok(VirtIOBlock *dev, |
| 507 | uint64_t sector, size_t size) |
| 508 | { |
Markus Armbruster | 3c2daac | 2014-07-09 19:07:31 +0200 | [diff] [blame] | 509 | uint64_t nb_sectors = size >> BDRV_SECTOR_BITS; |
| 510 | uint64_t total_sectors; |
| 511 | |
Peter Lieven | 75af1f3 | 2015-02-06 11:54:11 +0100 | [diff] [blame] | 512 | if (nb_sectors > BDRV_REQUEST_MAX_SECTORS) { |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 513 | return false; |
| 514 | } |
Markus Armbruster | d0e1437 | 2014-07-09 19:07:29 +0200 | [diff] [blame] | 515 | if (sector & dev->sector_mask) { |
| 516 | return false; |
| 517 | } |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 518 | if (size % dev->conf.conf.logical_block_size) { |
Markus Armbruster | d0e1437 | 2014-07-09 19:07:29 +0200 | [diff] [blame] | 519 | return false; |
| 520 | } |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 521 | blk_get_geometry(dev->blk, &total_sectors); |
Markus Armbruster | 3c2daac | 2014-07-09 19:07:31 +0200 | [diff] [blame] | 522 | if (sector > total_sectors || nb_sectors > total_sectors - sector) { |
| 523 | return false; |
| 524 | } |
Markus Armbruster | d0e1437 | 2014-07-09 19:07:29 +0200 | [diff] [blame] | 525 | return true; |
| 526 | } |
| 527 | |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 528 | static uint8_t virtio_blk_handle_discard_write_zeroes(VirtIOBlockReq *req, |
| 529 | struct virtio_blk_discard_write_zeroes *dwz_hdr, bool is_write_zeroes) |
| 530 | { |
| 531 | VirtIOBlock *s = req->dev; |
| 532 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 533 | uint64_t sector; |
| 534 | uint32_t num_sectors, flags, max_sectors; |
| 535 | uint8_t err_status; |
| 536 | int bytes; |
| 537 | |
| 538 | sector = virtio_ldq_p(vdev, &dwz_hdr->sector); |
| 539 | num_sectors = virtio_ldl_p(vdev, &dwz_hdr->num_sectors); |
| 540 | flags = virtio_ldl_p(vdev, &dwz_hdr->flags); |
| 541 | max_sectors = is_write_zeroes ? s->conf.max_write_zeroes_sectors : |
| 542 | s->conf.max_discard_sectors; |
| 543 | |
| 544 | /* |
| 545 | * max_sectors is at most BDRV_REQUEST_MAX_SECTORS, this check |
| 546 | * make us sure that "num_sectors << BDRV_SECTOR_BITS" can fit in |
| 547 | * the integer variable. |
| 548 | */ |
| 549 | if (unlikely(num_sectors > max_sectors)) { |
| 550 | err_status = VIRTIO_BLK_S_IOERR; |
| 551 | goto err; |
| 552 | } |
| 553 | |
| 554 | bytes = num_sectors << BDRV_SECTOR_BITS; |
| 555 | |
| 556 | if (unlikely(!virtio_blk_sect_range_ok(s, sector, bytes))) { |
| 557 | err_status = VIRTIO_BLK_S_IOERR; |
| 558 | goto err; |
| 559 | } |
| 560 | |
| 561 | /* |
| 562 | * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for discard |
| 563 | * and write zeroes commands if any unknown flag is set. |
| 564 | */ |
| 565 | if (unlikely(flags & ~VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { |
| 566 | err_status = VIRTIO_BLK_S_UNSUPP; |
| 567 | goto err; |
| 568 | } |
| 569 | |
| 570 | if (is_write_zeroes) { /* VIRTIO_BLK_T_WRITE_ZEROES */ |
| 571 | int blk_aio_flags = 0; |
| 572 | |
| 573 | if (flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP) { |
| 574 | blk_aio_flags |= BDRV_REQ_MAY_UNMAP; |
| 575 | } |
| 576 | |
| 577 | block_acct_start(blk_get_stats(s->blk), &req->acct, bytes, |
| 578 | BLOCK_ACCT_WRITE); |
| 579 | |
| 580 | blk_aio_pwrite_zeroes(s->blk, sector << BDRV_SECTOR_BITS, |
| 581 | bytes, blk_aio_flags, |
| 582 | virtio_blk_discard_write_zeroes_complete, req); |
| 583 | } else { /* VIRTIO_BLK_T_DISCARD */ |
| 584 | /* |
| 585 | * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for |
| 586 | * discard commands if the unmap flag is set. |
| 587 | */ |
| 588 | if (unlikely(flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { |
| 589 | err_status = VIRTIO_BLK_S_UNSUPP; |
| 590 | goto err; |
| 591 | } |
| 592 | |
| 593 | blk_aio_pdiscard(s->blk, sector << BDRV_SECTOR_BITS, bytes, |
| 594 | virtio_blk_discard_write_zeroes_complete, req); |
| 595 | } |
| 596 | |
| 597 | return VIRTIO_BLK_S_OK; |
| 598 | |
| 599 | err: |
| 600 | if (is_write_zeroes) { |
| 601 | block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_WRITE); |
| 602 | } |
| 603 | return err_status; |
| 604 | } |
| 605 | |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 606 | typedef struct ZoneCmdData { |
| 607 | VirtIOBlockReq *req; |
| 608 | struct iovec *in_iov; |
| 609 | unsigned in_num; |
| 610 | union { |
| 611 | struct { |
| 612 | unsigned int nr_zones; |
| 613 | BlockZoneDescriptor *zones; |
| 614 | } zone_report_data; |
| 615 | struct { |
| 616 | int64_t offset; |
| 617 | } zone_append_data; |
| 618 | }; |
| 619 | } ZoneCmdData; |
| 620 | |
| 621 | /* |
| 622 | * check zoned_request: error checking before issuing requests. If all checks |
| 623 | * passed, return true. |
| 624 | * append: true if only zone append requests issued. |
| 625 | */ |
| 626 | static bool check_zoned_request(VirtIOBlock *s, int64_t offset, int64_t len, |
| 627 | bool append, uint8_t *status) { |
| 628 | BlockDriverState *bs = blk_bs(s->blk); |
| 629 | int index; |
| 630 | |
| 631 | if (!virtio_has_feature(s->host_features, VIRTIO_BLK_F_ZONED)) { |
| 632 | *status = VIRTIO_BLK_S_UNSUPP; |
| 633 | return false; |
| 634 | } |
| 635 | |
| 636 | if (offset < 0 || len < 0 || len > (bs->total_sectors << BDRV_SECTOR_BITS) |
| 637 | || offset > (bs->total_sectors << BDRV_SECTOR_BITS) - len) { |
| 638 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 639 | return false; |
| 640 | } |
| 641 | |
| 642 | if (append) { |
| 643 | if (bs->bl.write_granularity) { |
| 644 | if ((offset % bs->bl.write_granularity) != 0) { |
| 645 | *status = VIRTIO_BLK_S_ZONE_UNALIGNED_WP; |
| 646 | return false; |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | index = offset / bs->bl.zone_size; |
| 651 | if (BDRV_ZT_IS_CONV(bs->wps->wp[index])) { |
| 652 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 653 | return false; |
| 654 | } |
| 655 | |
| 656 | if (len / 512 > bs->bl.max_append_sectors) { |
| 657 | if (bs->bl.max_append_sectors == 0) { |
| 658 | *status = VIRTIO_BLK_S_UNSUPP; |
| 659 | } else { |
| 660 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 661 | } |
| 662 | return false; |
| 663 | } |
| 664 | } |
| 665 | return true; |
| 666 | } |
| 667 | |
| 668 | static void virtio_blk_zone_report_complete(void *opaque, int ret) |
| 669 | { |
| 670 | ZoneCmdData *data = opaque; |
| 671 | VirtIOBlockReq *req = data->req; |
| 672 | VirtIOBlock *s = req->dev; |
| 673 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); |
| 674 | struct iovec *in_iov = data->in_iov; |
| 675 | unsigned in_num = data->in_num; |
| 676 | int64_t zrp_size, n, j = 0; |
| 677 | int64_t nz = data->zone_report_data.nr_zones; |
| 678 | int8_t err_status = VIRTIO_BLK_S_OK; |
| 679 | |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 680 | trace_virtio_blk_zone_report_complete(vdev, req, nz, ret); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 681 | if (ret) { |
| 682 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 683 | goto out; |
| 684 | } |
| 685 | |
| 686 | struct virtio_blk_zone_report zrp_hdr = (struct virtio_blk_zone_report) { |
| 687 | .nr_zones = cpu_to_le64(nz), |
| 688 | }; |
| 689 | zrp_size = sizeof(struct virtio_blk_zone_report) |
| 690 | + sizeof(struct virtio_blk_zone_descriptor) * nz; |
| 691 | n = iov_from_buf(in_iov, in_num, 0, &zrp_hdr, sizeof(zrp_hdr)); |
| 692 | if (n != sizeof(zrp_hdr)) { |
| 693 | virtio_error(vdev, "Driver provided input buffer that is too small!"); |
| 694 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 695 | goto out; |
| 696 | } |
| 697 | |
| 698 | for (size_t i = sizeof(zrp_hdr); i < zrp_size; |
| 699 | i += sizeof(struct virtio_blk_zone_descriptor), ++j) { |
| 700 | struct virtio_blk_zone_descriptor desc = |
| 701 | (struct virtio_blk_zone_descriptor) { |
| 702 | .z_start = cpu_to_le64(data->zone_report_data.zones[j].start |
| 703 | >> BDRV_SECTOR_BITS), |
| 704 | .z_cap = cpu_to_le64(data->zone_report_data.zones[j].cap |
| 705 | >> BDRV_SECTOR_BITS), |
| 706 | .z_wp = cpu_to_le64(data->zone_report_data.zones[j].wp |
| 707 | >> BDRV_SECTOR_BITS), |
| 708 | }; |
| 709 | |
| 710 | switch (data->zone_report_data.zones[j].type) { |
| 711 | case BLK_ZT_CONV: |
| 712 | desc.z_type = VIRTIO_BLK_ZT_CONV; |
| 713 | break; |
| 714 | case BLK_ZT_SWR: |
| 715 | desc.z_type = VIRTIO_BLK_ZT_SWR; |
| 716 | break; |
| 717 | case BLK_ZT_SWP: |
| 718 | desc.z_type = VIRTIO_BLK_ZT_SWP; |
| 719 | break; |
| 720 | default: |
| 721 | g_assert_not_reached(); |
| 722 | } |
| 723 | |
| 724 | switch (data->zone_report_data.zones[j].state) { |
| 725 | case BLK_ZS_RDONLY: |
| 726 | desc.z_state = VIRTIO_BLK_ZS_RDONLY; |
| 727 | break; |
| 728 | case BLK_ZS_OFFLINE: |
| 729 | desc.z_state = VIRTIO_BLK_ZS_OFFLINE; |
| 730 | break; |
| 731 | case BLK_ZS_EMPTY: |
| 732 | desc.z_state = VIRTIO_BLK_ZS_EMPTY; |
| 733 | break; |
| 734 | case BLK_ZS_CLOSED: |
| 735 | desc.z_state = VIRTIO_BLK_ZS_CLOSED; |
| 736 | break; |
| 737 | case BLK_ZS_FULL: |
| 738 | desc.z_state = VIRTIO_BLK_ZS_FULL; |
| 739 | break; |
| 740 | case BLK_ZS_EOPEN: |
| 741 | desc.z_state = VIRTIO_BLK_ZS_EOPEN; |
| 742 | break; |
| 743 | case BLK_ZS_IOPEN: |
| 744 | desc.z_state = VIRTIO_BLK_ZS_IOPEN; |
| 745 | break; |
| 746 | case BLK_ZS_NOT_WP: |
| 747 | desc.z_state = VIRTIO_BLK_ZS_NOT_WP; |
| 748 | break; |
| 749 | default: |
| 750 | g_assert_not_reached(); |
| 751 | } |
| 752 | |
| 753 | /* TODO: it takes O(n^2) time complexity. Optimizations required. */ |
| 754 | n = iov_from_buf(in_iov, in_num, i, &desc, sizeof(desc)); |
| 755 | if (n != sizeof(desc)) { |
| 756 | virtio_error(vdev, "Driver provided input buffer " |
| 757 | "for descriptors that is too small!"); |
| 758 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | out: |
| 763 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
| 764 | virtio_blk_req_complete(req, err_status); |
| 765 | virtio_blk_free_request(req); |
| 766 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
| 767 | g_free(data->zone_report_data.zones); |
| 768 | g_free(data); |
| 769 | } |
| 770 | |
| 771 | static void virtio_blk_handle_zone_report(VirtIOBlockReq *req, |
| 772 | struct iovec *in_iov, |
| 773 | unsigned in_num) |
| 774 | { |
| 775 | VirtIOBlock *s = req->dev; |
| 776 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 777 | unsigned int nr_zones; |
| 778 | ZoneCmdData *data; |
| 779 | int64_t zone_size, offset; |
| 780 | uint8_t err_status; |
| 781 | |
| 782 | if (req->in_len < sizeof(struct virtio_blk_inhdr) + |
| 783 | sizeof(struct virtio_blk_zone_report) + |
| 784 | sizeof(struct virtio_blk_zone_descriptor)) { |
| 785 | virtio_error(vdev, "in buffer too small for zone report"); |
| 786 | return; |
| 787 | } |
| 788 | |
| 789 | /* start byte offset of the zone report */ |
| 790 | offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; |
| 791 | if (!check_zoned_request(s, offset, 0, false, &err_status)) { |
| 792 | goto out; |
| 793 | } |
| 794 | nr_zones = (req->in_len - sizeof(struct virtio_blk_inhdr) - |
| 795 | sizeof(struct virtio_blk_zone_report)) / |
| 796 | sizeof(struct virtio_blk_zone_descriptor); |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 797 | trace_virtio_blk_handle_zone_report(vdev, req, |
| 798 | offset >> BDRV_SECTOR_BITS, nr_zones); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 799 | |
| 800 | zone_size = sizeof(BlockZoneDescriptor) * nr_zones; |
| 801 | data = g_malloc(sizeof(ZoneCmdData)); |
| 802 | data->req = req; |
| 803 | data->in_iov = in_iov; |
| 804 | data->in_num = in_num; |
| 805 | data->zone_report_data.nr_zones = nr_zones; |
| 806 | data->zone_report_data.zones = g_malloc(zone_size), |
| 807 | |
| 808 | blk_aio_zone_report(s->blk, offset, &data->zone_report_data.nr_zones, |
| 809 | data->zone_report_data.zones, |
| 810 | virtio_blk_zone_report_complete, data); |
| 811 | return; |
| 812 | out: |
| 813 | virtio_blk_req_complete(req, err_status); |
| 814 | virtio_blk_free_request(req); |
| 815 | } |
| 816 | |
| 817 | static void virtio_blk_zone_mgmt_complete(void *opaque, int ret) |
| 818 | { |
| 819 | VirtIOBlockReq *req = opaque; |
| 820 | VirtIOBlock *s = req->dev; |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 821 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 822 | int8_t err_status = VIRTIO_BLK_S_OK; |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 823 | trace_virtio_blk_zone_mgmt_complete(vdev, req,ret); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 824 | |
| 825 | if (ret) { |
| 826 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 827 | } |
| 828 | |
| 829 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
| 830 | virtio_blk_req_complete(req, err_status); |
| 831 | virtio_blk_free_request(req); |
| 832 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
| 833 | } |
| 834 | |
| 835 | static int virtio_blk_handle_zone_mgmt(VirtIOBlockReq *req, BlockZoneOp op) |
| 836 | { |
| 837 | VirtIOBlock *s = req->dev; |
| 838 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 839 | BlockDriverState *bs = blk_bs(s->blk); |
| 840 | int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; |
| 841 | uint64_t len; |
| 842 | uint64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; |
| 843 | uint8_t err_status = VIRTIO_BLK_S_OK; |
| 844 | |
| 845 | uint32_t type = virtio_ldl_p(vdev, &req->out.type); |
| 846 | if (type == VIRTIO_BLK_T_ZONE_RESET_ALL) { |
| 847 | /* Entire drive capacity */ |
| 848 | offset = 0; |
| 849 | len = capacity; |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 850 | trace_virtio_blk_handle_zone_reset_all(vdev, req, 0, |
| 851 | bs->total_sectors); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 852 | } else { |
| 853 | if (bs->bl.zone_size > capacity - offset) { |
| 854 | /* The zoned device allows the last smaller zone. */ |
| 855 | len = capacity - bs->bl.zone_size * (bs->bl.nr_zones - 1); |
| 856 | } else { |
| 857 | len = bs->bl.zone_size; |
| 858 | } |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 859 | trace_virtio_blk_handle_zone_mgmt(vdev, req, op, |
| 860 | offset >> BDRV_SECTOR_BITS, |
| 861 | len >> BDRV_SECTOR_BITS); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | if (!check_zoned_request(s, offset, len, false, &err_status)) { |
| 865 | goto out; |
| 866 | } |
| 867 | |
| 868 | blk_aio_zone_mgmt(s->blk, op, offset, len, |
| 869 | virtio_blk_zone_mgmt_complete, req); |
| 870 | |
| 871 | return 0; |
| 872 | out: |
| 873 | virtio_blk_req_complete(req, err_status); |
| 874 | virtio_blk_free_request(req); |
| 875 | return err_status; |
| 876 | } |
| 877 | |
| 878 | static void virtio_blk_zone_append_complete(void *opaque, int ret) |
| 879 | { |
| 880 | ZoneCmdData *data = opaque; |
| 881 | VirtIOBlockReq *req = data->req; |
| 882 | VirtIOBlock *s = req->dev; |
| 883 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); |
| 884 | int64_t append_sector, n; |
| 885 | uint8_t err_status = VIRTIO_BLK_S_OK; |
| 886 | |
| 887 | if (ret) { |
| 888 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 889 | goto out; |
| 890 | } |
| 891 | |
| 892 | virtio_stq_p(vdev, &append_sector, |
| 893 | data->zone_append_data.offset >> BDRV_SECTOR_BITS); |
| 894 | n = iov_from_buf(data->in_iov, data->in_num, 0, &append_sector, |
| 895 | sizeof(append_sector)); |
| 896 | if (n != sizeof(append_sector)) { |
| 897 | virtio_error(vdev, "Driver provided input buffer less than size of " |
| 898 | "append_sector"); |
| 899 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; |
| 900 | goto out; |
| 901 | } |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 902 | trace_virtio_blk_zone_append_complete(vdev, req, append_sector, ret); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 903 | |
| 904 | out: |
| 905 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
| 906 | virtio_blk_req_complete(req, err_status); |
| 907 | virtio_blk_free_request(req); |
| 908 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
| 909 | g_free(data); |
| 910 | } |
| 911 | |
| 912 | static int virtio_blk_handle_zone_append(VirtIOBlockReq *req, |
| 913 | struct iovec *out_iov, |
| 914 | struct iovec *in_iov, |
| 915 | uint64_t out_num, |
| 916 | unsigned in_num) { |
| 917 | VirtIOBlock *s = req->dev; |
| 918 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 919 | uint8_t err_status = VIRTIO_BLK_S_OK; |
| 920 | |
| 921 | int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; |
| 922 | int64_t len = iov_size(out_iov, out_num); |
| 923 | |
Sam Li | 4e92acf | 2023-05-08 13:19:15 +0800 | [diff] [blame] | 924 | trace_virtio_blk_handle_zone_append(vdev, req, offset >> BDRV_SECTOR_BITS); |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 925 | if (!check_zoned_request(s, offset, len, true, &err_status)) { |
| 926 | goto out; |
| 927 | } |
| 928 | |
| 929 | ZoneCmdData *data = g_malloc(sizeof(ZoneCmdData)); |
| 930 | data->req = req; |
| 931 | data->in_iov = in_iov; |
| 932 | data->in_num = in_num; |
| 933 | data->zone_append_data.offset = offset; |
| 934 | qemu_iovec_init_external(&req->qiov, out_iov, out_num); |
Sam Li | 52eb76f | 2023-05-08 13:19:14 +0800 | [diff] [blame] | 935 | |
| 936 | block_acct_start(blk_get_stats(s->blk), &req->acct, len, |
| 937 | BLOCK_ACCT_ZONE_APPEND); |
| 938 | |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 939 | blk_aio_zone_append(s->blk, &data->zone_append_data.offset, &req->qiov, 0, |
| 940 | virtio_blk_zone_append_complete, data); |
| 941 | return 0; |
| 942 | |
| 943 | out: |
| 944 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
| 945 | virtio_blk_req_complete(req, err_status); |
| 946 | virtio_blk_free_request(req); |
| 947 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
| 948 | return err_status; |
| 949 | } |
| 950 | |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 951 | static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 952 | { |
Aurelien Jarno | 92e3c2a | 2011-01-25 11:55:14 +0100 | [diff] [blame] | 953 | uint32_t type; |
Stefan Hajnoczi | f897bf7 | 2014-07-09 10:05:49 +0200 | [diff] [blame] | 954 | struct iovec *in_iov = req->elem.in_sg; |
Dongli Zhang | 5636da7 | 2018-11-07 00:09:16 +0800 | [diff] [blame] | 955 | struct iovec *out_iov = req->elem.out_sg; |
Stefan Hajnoczi | f897bf7 | 2014-07-09 10:05:49 +0200 | [diff] [blame] | 956 | unsigned in_num = req->elem.in_num; |
| 957 | unsigned out_num = req->elem.out_num; |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 958 | VirtIOBlock *s = req->dev; |
| 959 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
Aurelien Jarno | 92e3c2a | 2011-01-25 11:55:14 +0100 | [diff] [blame] | 960 | |
Stefan Hajnoczi | f897bf7 | 2014-07-09 10:05:49 +0200 | [diff] [blame] | 961 | if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 962 | virtio_error(vdev, "virtio-blk missing headers"); |
| 963 | return -1; |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 964 | } |
| 965 | |
Dongli Zhang | 5636da7 | 2018-11-07 00:09:16 +0800 | [diff] [blame] | 966 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &req->out, |
Fam Zheng | 827805a | 2014-06-11 12:11:48 +0800 | [diff] [blame] | 967 | sizeof(req->out)) != sizeof(req->out))) { |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 968 | virtio_error(vdev, "virtio-blk request outhdr too short"); |
| 969 | return -1; |
Fam Zheng | 827805a | 2014-06-11 12:11:48 +0800 | [diff] [blame] | 970 | } |
Fam Zheng | ee17e84 | 2014-06-11 12:11:50 +0800 | [diff] [blame] | 971 | |
Stefan Hajnoczi | 7bd04a0 | 2020-09-17 10:44:54 +0100 | [diff] [blame] | 972 | iov_discard_front_undoable(&out_iov, &out_num, sizeof(req->out), |
| 973 | &req->outhdr_undo); |
Fam Zheng | ee17e84 | 2014-06-11 12:11:50 +0800 | [diff] [blame] | 974 | |
Gonglei | 1204854 | 2015-06-24 17:29:24 +0800 | [diff] [blame] | 975 | if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 976 | virtio_error(vdev, "virtio-blk request inhdr too short"); |
Stefan Hajnoczi | 7bd04a0 | 2020-09-17 10:44:54 +0100 | [diff] [blame] | 977 | iov_discard_undo(&req->outhdr_undo); |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 978 | return -1; |
Fam Zheng | ee17e84 | 2014-06-11 12:11:50 +0800 | [diff] [blame] | 979 | } |
| 980 | |
Paolo Bonzini | 2a6cdd6 | 2015-04-02 19:50:44 +0200 | [diff] [blame] | 981 | /* We always touch the last byte, so just see how big in_iov is. */ |
| 982 | req->in_len = iov_size(in_iov, in_num); |
Fam Zheng | ee17e84 | 2014-06-11 12:11:50 +0800 | [diff] [blame] | 983 | req->in = (void *)in_iov[in_num - 1].iov_base |
| 984 | + in_iov[in_num - 1].iov_len |
| 985 | - sizeof(struct virtio_blk_inhdr); |
Stefan Hajnoczi | 7bd04a0 | 2020-09-17 10:44:54 +0100 | [diff] [blame] | 986 | iov_discard_back_undoable(in_iov, &in_num, sizeof(struct virtio_blk_inhdr), |
| 987 | &req->inhdr_undo); |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 988 | |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 989 | type = virtio_ldl_p(vdev, &req->out.type); |
Aurelien Jarno | 92e3c2a | 2011-01-25 11:55:14 +0100 | [diff] [blame] | 990 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 991 | /* VIRTIO_BLK_T_OUT defines the command direction. VIRTIO_BLK_T_BARRIER |
Stefan Weil | 631b22e | 2015-04-09 20:32:39 +0200 | [diff] [blame] | 992 | * is an optional flag. Although a guest should not send this flag if |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 993 | * not negotiated we ignored it in the past. So keep ignoring it. */ |
| 994 | switch (type & ~(VIRTIO_BLK_T_OUT | VIRTIO_BLK_T_BARRIER)) { |
| 995 | case VIRTIO_BLK_T_IN: |
| 996 | { |
| 997 | bool is_write = type & VIRTIO_BLK_T_OUT; |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 998 | req->sector_num = virtio_ldq_p(vdev, &req->out.sector); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 999 | |
| 1000 | if (is_write) { |
Dongli Zhang | 5636da7 | 2018-11-07 00:09:16 +0800 | [diff] [blame] | 1001 | qemu_iovec_init_external(&req->qiov, out_iov, out_num); |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 1002 | trace_virtio_blk_handle_write(vdev, req, req->sector_num, |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1003 | req->qiov.size / BDRV_SECTOR_SIZE); |
| 1004 | } else { |
| 1005 | qemu_iovec_init_external(&req->qiov, in_iov, in_num); |
Stefan Hajnoczi | a576cea | 2017-06-14 10:29:30 +0100 | [diff] [blame] | 1006 | trace_virtio_blk_handle_read(vdev, req, req->sector_num, |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1007 | req->qiov.size / BDRV_SECTOR_SIZE); |
| 1008 | } |
| 1009 | |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 1010 | if (!virtio_blk_sect_range_ok(s, req->sector_num, req->qiov.size)) { |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1011 | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 1012 | block_acct_invalid(blk_get_stats(s->blk), |
Alberto Garcia | 01762e0 | 2015-10-28 17:33:12 +0200 | [diff] [blame] | 1013 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1014 | virtio_blk_free_request(req); |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 1015 | return 0; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1016 | } |
| 1017 | |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 1018 | block_acct_start(blk_get_stats(s->blk), &req->acct, req->qiov.size, |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1019 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); |
| 1020 | |
| 1021 | /* merge would exceed maximum number of requests or IO direction |
| 1022 | * changes */ |
| 1023 | if (mrb->num_reqs > 0 && (mrb->num_reqs == VIRTIO_BLK_MAX_MERGE_REQS || |
Peter Lieven | c99495a | 2015-02-02 14:52:22 +0100 | [diff] [blame] | 1024 | is_write != mrb->is_write || |
Stefano Garzarella | 9a6719d | 2019-02-08 15:23:47 +0100 | [diff] [blame] | 1025 | !s->conf.request_merging)) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 1026 | virtio_blk_submit_multireq(s, mrb); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | assert(mrb->num_reqs < VIRTIO_BLK_MAX_MERGE_REQS); |
| 1030 | mrb->reqs[mrb->num_reqs++] = req; |
| 1031 | mrb->is_write = is_write; |
| 1032 | break; |
| 1033 | } |
| 1034 | case VIRTIO_BLK_T_FLUSH: |
Christoph Hellwig | c20fd87 | 2010-06-08 18:26:07 +0200 | [diff] [blame] | 1035 | virtio_blk_handle_flush(req, mrb); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1036 | break; |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 1037 | case VIRTIO_BLK_T_ZONE_REPORT: |
| 1038 | virtio_blk_handle_zone_report(req, in_iov, in_num); |
| 1039 | break; |
| 1040 | case VIRTIO_BLK_T_ZONE_OPEN: |
| 1041 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_OPEN); |
| 1042 | break; |
| 1043 | case VIRTIO_BLK_T_ZONE_CLOSE: |
| 1044 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_CLOSE); |
| 1045 | break; |
| 1046 | case VIRTIO_BLK_T_ZONE_FINISH: |
| 1047 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_FINISH); |
| 1048 | break; |
| 1049 | case VIRTIO_BLK_T_ZONE_RESET: |
| 1050 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); |
| 1051 | break; |
| 1052 | case VIRTIO_BLK_T_ZONE_RESET_ALL: |
| 1053 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); |
| 1054 | break; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1055 | case VIRTIO_BLK_T_SCSI_CMD: |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 1056 | virtio_blk_handle_scsi(req); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1057 | break; |
| 1058 | case VIRTIO_BLK_T_GET_ID: |
| 1059 | { |
Markus Armbruster | a8686a9 | 2011-06-20 11:35:18 +0200 | [diff] [blame] | 1060 | /* |
| 1061 | * NB: per existing s/n string convention the string is |
| 1062 | * terminated by '\0' only when shorter than buffer. |
| 1063 | */ |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1064 | const char *serial = s->conf.serial ? s->conf.serial : ""; |
Marc Marí | a83ceea | 2014-08-12 13:41:51 +0200 | [diff] [blame] | 1065 | size_t size = MIN(strlen(serial) + 1, |
| 1066 | MIN(iov_size(in_iov, in_num), |
| 1067 | VIRTIO_BLK_ID_BYTES)); |
| 1068 | iov_from_buf(in_iov, in_num, 0, serial, size); |
john cooper | 2930b31 | 2010-07-02 13:44:25 -0400 | [diff] [blame] | 1069 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 1070 | virtio_blk_free_request(req); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1071 | break; |
| 1072 | } |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 1073 | case VIRTIO_BLK_T_ZONE_APPEND & ~VIRTIO_BLK_T_OUT: |
| 1074 | /* |
| 1075 | * Passing out_iov/out_num and in_iov/in_num is not safe |
| 1076 | * to access req->elem.out_sg directly because it may be |
| 1077 | * modified by virtio_blk_handle_request(). |
| 1078 | */ |
| 1079 | virtio_blk_handle_zone_append(req, out_iov, in_iov, out_num, in_num); |
| 1080 | break; |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1081 | /* |
| 1082 | * VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES are defined with |
| 1083 | * VIRTIO_BLK_T_OUT flag set. We masked this flag in the switch statement, |
| 1084 | * so we must mask it for these requests, then we will check if it is set. |
| 1085 | */ |
| 1086 | case VIRTIO_BLK_T_DISCARD & ~VIRTIO_BLK_T_OUT: |
| 1087 | case VIRTIO_BLK_T_WRITE_ZEROES & ~VIRTIO_BLK_T_OUT: |
| 1088 | { |
| 1089 | struct virtio_blk_discard_write_zeroes dwz_hdr; |
| 1090 | size_t out_len = iov_size(out_iov, out_num); |
| 1091 | bool is_write_zeroes = (type & ~VIRTIO_BLK_T_BARRIER) == |
| 1092 | VIRTIO_BLK_T_WRITE_ZEROES; |
| 1093 | uint8_t err_status; |
| 1094 | |
| 1095 | /* |
| 1096 | * Unsupported if VIRTIO_BLK_T_OUT is not set or the request contains |
| 1097 | * more than one segment. |
| 1098 | */ |
| 1099 | if (unlikely(!(type & VIRTIO_BLK_T_OUT) || |
| 1100 | out_len > sizeof(dwz_hdr))) { |
| 1101 | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
| 1102 | virtio_blk_free_request(req); |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &dwz_hdr, |
| 1107 | sizeof(dwz_hdr)) != sizeof(dwz_hdr))) { |
Stefan Hajnoczi | 7bd04a0 | 2020-09-17 10:44:54 +0100 | [diff] [blame] | 1108 | iov_discard_undo(&req->inhdr_undo); |
| 1109 | iov_discard_undo(&req->outhdr_undo); |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1110 | virtio_error(vdev, "virtio-blk discard/write_zeroes header" |
| 1111 | " too short"); |
| 1112 | return -1; |
| 1113 | } |
| 1114 | |
| 1115 | err_status = virtio_blk_handle_discard_write_zeroes(req, &dwz_hdr, |
| 1116 | is_write_zeroes); |
| 1117 | if (err_status != VIRTIO_BLK_S_OK) { |
| 1118 | virtio_blk_req_complete(req, err_status); |
| 1119 | virtio_blk_free_request(req); |
| 1120 | } |
| 1121 | |
| 1122 | break; |
| 1123 | } |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1124 | default: |
Alexey Zaytsev | 9e72c45 | 2012-12-13 09:03:43 +0200 | [diff] [blame] | 1125 | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
Fam Zheng | 671ec3f | 2014-06-11 12:11:43 +0800 | [diff] [blame] | 1126 | virtio_blk_free_request(req); |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 1127 | } |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 1128 | return 0; |
Kevin Wolf | bc6694d | 2010-01-27 13:12:34 +0100 | [diff] [blame] | 1129 | } |
| 1130 | |
Stefan Hajnoczi | 186b969 | 2021-12-07 13:23:33 +0000 | [diff] [blame] | 1131 | void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq) |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1132 | { |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1133 | VirtIOBlockReq *req; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1134 | MultiReqBuffer mrb = {}; |
Stefan Hajnoczi | d0435bc | 2019-12-09 21:09:57 +0000 | [diff] [blame] | 1135 | bool suppress_notifications = virtio_queue_get_notification(vq); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1136 | |
Paolo Bonzini | 9d45665 | 2017-02-13 14:52:30 +0100 | [diff] [blame] | 1137 | aio_context_acquire(blk_get_aio_context(s->blk)); |
Stefan Hajnoczi | ccee48a | 2023-09-13 16:00:42 -0400 | [diff] [blame] | 1138 | defer_call_begin(); |
Stefan Hajnoczi | fc73548 | 2015-07-20 16:54:16 +0100 | [diff] [blame] | 1139 | |
Stefan Hajnoczi | 9ef9d40 | 2016-12-01 19:26:46 +0000 | [diff] [blame] | 1140 | do { |
Stefan Hajnoczi | d0435bc | 2019-12-09 21:09:57 +0000 | [diff] [blame] | 1141 | if (suppress_notifications) { |
| 1142 | virtio_queue_set_notification(vq, 0); |
| 1143 | } |
Stefan Hajnoczi | 9ef9d40 | 2016-12-01 19:26:46 +0000 | [diff] [blame] | 1144 | |
| 1145 | while ((req = virtio_blk_get_request(s, vq))) { |
| 1146 | if (virtio_blk_handle_request(req, &mrb)) { |
| 1147 | virtqueue_detach_element(req->vq, &req->elem, 0); |
| 1148 | virtio_blk_free_request(req); |
| 1149 | break; |
| 1150 | } |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 1151 | } |
Stefan Hajnoczi | 9ef9d40 | 2016-12-01 19:26:46 +0000 | [diff] [blame] | 1152 | |
Stefan Hajnoczi | d0435bc | 2019-12-09 21:09:57 +0000 | [diff] [blame] | 1153 | if (suppress_notifications) { |
| 1154 | virtio_queue_set_notification(vq, 1); |
| 1155 | } |
Stefan Hajnoczi | 9ef9d40 | 2016-12-01 19:26:46 +0000 | [diff] [blame] | 1156 | } while (!virtio_queue_empty(vq)); |
Kevin Wolf | 91553dc | 2009-09-09 17:53:38 +0200 | [diff] [blame] | 1157 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1158 | if (mrb.num_reqs) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 1159 | virtio_blk_submit_multireq(s, &mrb); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1160 | } |
Stefan Hajnoczi | fc73548 | 2015-07-20 16:54:16 +0100 | [diff] [blame] | 1161 | |
Stefan Hajnoczi | ccee48a | 2023-09-13 16:00:42 -0400 | [diff] [blame] | 1162 | defer_call_end(); |
Paolo Bonzini | 9d45665 | 2017-02-13 14:52:30 +0100 | [diff] [blame] | 1163 | aio_context_release(blk_get_aio_context(s->blk)); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
Michael S. Tsirkin | 8a2fad5 | 2016-04-06 12:16:26 +0200 | [diff] [blame] | 1166 | static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
| 1167 | { |
| 1168 | VirtIOBlock *s = (VirtIOBlock *)vdev; |
| 1169 | |
Stefan Hajnoczi | 186b969 | 2021-12-07 13:23:33 +0000 | [diff] [blame] | 1170 | if (s->dataplane && !s->dataplane_started) { |
Michael S. Tsirkin | 8a2fad5 | 2016-04-06 12:16:26 +0200 | [diff] [blame] | 1171 | /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start |
| 1172 | * dataplane here instead of waiting for .set_status(). |
| 1173 | */ |
Paolo Bonzini | 9ffe337 | 2016-10-21 22:48:09 +0200 | [diff] [blame] | 1174 | virtio_device_start_ioeventfd(vdev); |
Michael S. Tsirkin | 8a2fad5 | 2016-04-06 12:16:26 +0200 | [diff] [blame] | 1175 | if (!s->dataplane_disabled) { |
| 1176 | return; |
| 1177 | } |
| 1178 | } |
Stefan Hajnoczi | 186b969 | 2021-12-07 13:23:33 +0000 | [diff] [blame] | 1179 | virtio_blk_handle_vq(s, vq); |
Michael S. Tsirkin | 8a2fad5 | 2016-04-06 12:16:26 +0200 | [diff] [blame] | 1180 | } |
| 1181 | |
Stefan Hajnoczi | a937f8e | 2022-11-02 14:23:37 -0400 | [diff] [blame] | 1182 | static void virtio_blk_dma_restart_bh(void *opaque) |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1183 | { |
Stefan Hajnoczi | a937f8e | 2022-11-02 14:23:37 -0400 | [diff] [blame] | 1184 | VirtIOBlock *s = opaque; |
| 1185 | |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1186 | VirtIOBlockReq *req = s->rq; |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1187 | MultiReqBuffer mrb = {}; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1188 | |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1189 | s->rq = NULL; |
| 1190 | |
Paolo Bonzini | 1919631 | 2017-02-13 14:52:31 +0100 | [diff] [blame] | 1191 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1192 | while (req) { |
zhanghailiang | 1bdb176 | 2014-08-18 15:42:50 +0800 | [diff] [blame] | 1193 | VirtIOBlockReq *next = req->next; |
Greg Kurz | 20ea686 | 2016-09-30 17:13:07 +0200 | [diff] [blame] | 1194 | if (virtio_blk_handle_request(req, &mrb)) { |
| 1195 | /* Device is now broken and won't do any processing until it gets |
| 1196 | * reset. Already queued requests will be lost: let's purge them. |
| 1197 | */ |
| 1198 | while (req) { |
| 1199 | next = req->next; |
| 1200 | virtqueue_detach_element(req->vq, &req->elem, 0); |
| 1201 | virtio_blk_free_request(req); |
| 1202 | req = next; |
| 1203 | } |
| 1204 | break; |
| 1205 | } |
zhanghailiang | 1bdb176 | 2014-08-18 15:42:50 +0800 | [diff] [blame] | 1206 | req = next; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1207 | } |
Kevin Wolf | f1b5286 | 2010-01-27 13:12:35 +0100 | [diff] [blame] | 1208 | |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1209 | if (mrb.num_reqs) { |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 1210 | virtio_blk_submit_multireq(s, &mrb); |
Peter Lieven | 95f7142 | 2015-02-02 14:52:21 +0100 | [diff] [blame] | 1211 | } |
Stefan Hajnoczi | a937f8e | 2022-11-02 14:23:37 -0400 | [diff] [blame] | 1212 | |
| 1213 | /* Paired with inc in virtio_blk_dma_restart_cb() */ |
| 1214 | blk_dec_in_flight(s->conf.conf.blk); |
| 1215 | |
Paolo Bonzini | 1919631 | 2017-02-13 14:52:31 +0100 | [diff] [blame] | 1216 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1217 | } |
| 1218 | |
Philippe Mathieu-Daudé | 538f049 | 2021-01-11 16:20:20 +0100 | [diff] [blame] | 1219 | static void virtio_blk_dma_restart_cb(void *opaque, bool running, |
Luiz Capitulino | 1dfb4dd | 2011-07-29 14:26:33 -0300 | [diff] [blame] | 1220 | RunState state) |
Markus Armbruster | 213189a | 2009-07-28 14:33:41 -0400 | [diff] [blame] | 1221 | { |
| 1222 | VirtIOBlock *s = opaque; |
| 1223 | |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1224 | if (!running) { |
Markus Armbruster | 213189a | 2009-07-28 14:33:41 -0400 | [diff] [blame] | 1225 | return; |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1226 | } |
Markus Armbruster | 213189a | 2009-07-28 14:33:41 -0400 | [diff] [blame] | 1227 | |
Stefan Hajnoczi | a937f8e | 2022-11-02 14:23:37 -0400 | [diff] [blame] | 1228 | /* Paired with dec in virtio_blk_dma_restart_bh() */ |
| 1229 | blk_inc_in_flight(s->conf.conf.blk); |
| 1230 | |
| 1231 | aio_bh_schedule_oneshot(blk_get_aio_context(s->conf.conf.blk), |
| 1232 | virtio_blk_dma_restart_bh, s); |
Markus Armbruster | 213189a | 2009-07-28 14:33:41 -0400 | [diff] [blame] | 1233 | } |
| 1234 | |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1235 | static void virtio_blk_reset(VirtIODevice *vdev) |
| 1236 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1237 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Alexander Yarygin | 6e40b3b | 2015-06-17 13:37:20 +0300 | [diff] [blame] | 1238 | AioContext *ctx; |
Fam Zheng | 26307f6 | 2016-08-04 10:44:13 +0800 | [diff] [blame] | 1239 | VirtIOBlockReq *req; |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1240 | |
Alexander Yarygin | 6e40b3b | 2015-06-17 13:37:20 +0300 | [diff] [blame] | 1241 | ctx = blk_get_aio_context(s->blk); |
| 1242 | aio_context_acquire(ctx); |
| 1243 | blk_drain(s->blk); |
| 1244 | |
Fam Zheng | 26307f6 | 2016-08-04 10:44:13 +0800 | [diff] [blame] | 1245 | /* We drop queued requests after blk_drain() because blk_drain() itself can |
| 1246 | * produce them. */ |
| 1247 | while (s->rq) { |
| 1248 | req = s->rq; |
| 1249 | s->rq = req->next; |
Stefan Hajnoczi | 97b93c8 | 2016-09-19 14:28:04 +0100 | [diff] [blame] | 1250 | virtqueue_detach_element(req->vq, &req->elem, 0); |
Fam Zheng | 26307f6 | 2016-08-04 10:44:13 +0800 | [diff] [blame] | 1251 | virtio_blk_free_request(req); |
| 1252 | } |
| 1253 | |
Alexander Yarygin | 6e40b3b | 2015-06-17 13:37:20 +0300 | [diff] [blame] | 1254 | aio_context_release(ctx); |
| 1255 | |
Paolo Bonzini | 9ffe337 | 2016-10-21 22:48:09 +0200 | [diff] [blame] | 1256 | assert(!s->dataplane_started); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1257 | blk_set_enable_write_cache(s->blk, s->original_wce); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1258 | } |
| 1259 | |
john cooper | bf01129 | 2009-06-22 14:26:51 -0400 | [diff] [blame] | 1260 | /* coalesce internal state, copy to pci i/o region 0 |
| 1261 | */ |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1262 | static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) |
| 1263 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1264 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1265 | BlockConf *conf = &s->conf.conf; |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 1266 | BlockDriverState *bs = blk_bs(s->blk); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1267 | struct virtio_blk_config blkcfg; |
| 1268 | uint64_t capacity; |
Stefan Hajnoczi | 17d0bc0 | 2017-08-08 13:22:51 +0100 | [diff] [blame] | 1269 | int64_t length; |
Markus Armbruster | f751673 | 2014-10-07 13:59:16 +0200 | [diff] [blame] | 1270 | int blk_size = conf->logical_block_size; |
Emanuele Giuseppe Esposito | 1f433e8 | 2023-02-08 06:11:48 -0500 | [diff] [blame] | 1271 | AioContext *ctx; |
| 1272 | |
| 1273 | ctx = blk_get_aio_context(s->blk); |
| 1274 | aio_context_acquire(ctx); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1275 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1276 | blk_get_geometry(s->blk, &capacity); |
Gerd Hoffmann | 5c5dafd | 2009-06-12 09:50:18 +0200 | [diff] [blame] | 1277 | memset(&blkcfg, 0, sizeof(blkcfg)); |
Rusty Russell | 783d189 | 2014-06-24 19:43:44 +0200 | [diff] [blame] | 1278 | virtio_stq_p(vdev, &blkcfg.capacity, capacity); |
Denis Plotnikov | 1bf8a98 | 2019-12-20 17:09:04 +0300 | [diff] [blame] | 1279 | virtio_stl_p(vdev, &blkcfg.seg_max, |
| 1280 | s->conf.seg_max_adjust ? s->conf.queue_size - 2 : 128 - 2); |
Michael S. Tsirkin | 907eb3e | 2015-02-16 22:36:03 +0100 | [diff] [blame] | 1281 | virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls); |
Rusty Russell | 783d189 | 2014-06-24 19:43:44 +0200 | [diff] [blame] | 1282 | virtio_stl_p(vdev, &blkcfg.blk_size, blk_size); |
Markus Armbruster | f751673 | 2014-10-07 13:59:16 +0200 | [diff] [blame] | 1283 | virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size); |
Roman Kagan | 6abee26 | 2020-05-29 01:55:09 +0300 | [diff] [blame] | 1284 | virtio_stl_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); |
Michael S. Tsirkin | 907eb3e | 2015-02-16 22:36:03 +0100 | [diff] [blame] | 1285 | blkcfg.geometry.heads = conf->heads; |
Christian Borntraeger | 136be99 | 2012-05-24 13:22:55 +0200 | [diff] [blame] | 1286 | /* |
| 1287 | * We must ensure that the block device capacity is a multiple of |
Peter Maydell | e03ba13 | 2013-04-09 12:48:19 +0100 | [diff] [blame] | 1288 | * the logical block size. If that is not the case, let's use |
Christian Borntraeger | 136be99 | 2012-05-24 13:22:55 +0200 | [diff] [blame] | 1289 | * sector_mask to adopt the geometry to have a correct picture. |
| 1290 | * For those devices where the capacity is ok for the given geometry |
Peter Maydell | e03ba13 | 2013-04-09 12:48:19 +0100 | [diff] [blame] | 1291 | * we don't touch the sector value of the geometry, since some devices |
Christian Borntraeger | 136be99 | 2012-05-24 13:22:55 +0200 | [diff] [blame] | 1292 | * (like s390 dasd) need a specific value. Here the capacity is already |
| 1293 | * cyls*heads*secs*blk_size and the sector value is not block size |
| 1294 | * divided by 512 - instead it is the amount of blk_size blocks |
| 1295 | * per track (cylinder). |
| 1296 | */ |
Stefan Hajnoczi | 17d0bc0 | 2017-08-08 13:22:51 +0100 | [diff] [blame] | 1297 | length = blk_getlength(s->blk); |
Emanuele Giuseppe Esposito | 1f433e8 | 2023-02-08 06:11:48 -0500 | [diff] [blame] | 1298 | aio_context_release(ctx); |
Stefan Hajnoczi | 17d0bc0 | 2017-08-08 13:22:51 +0100 | [diff] [blame] | 1299 | if (length > 0 && length / conf->heads / conf->secs % blk_size) { |
Michael S. Tsirkin | 907eb3e | 2015-02-16 22:36:03 +0100 | [diff] [blame] | 1300 | blkcfg.geometry.sectors = conf->secs & ~s->sector_mask; |
Christian Borntraeger | 136be99 | 2012-05-24 13:22:55 +0200 | [diff] [blame] | 1301 | } else { |
Michael S. Tsirkin | 907eb3e | 2015-02-16 22:36:03 +0100 | [diff] [blame] | 1302 | blkcfg.geometry.sectors = conf->secs; |
Christian Borntraeger | 136be99 | 2012-05-24 13:22:55 +0200 | [diff] [blame] | 1303 | } |
Blue Swirl | c7085da | 2009-06-13 13:20:25 +0000 | [diff] [blame] | 1304 | blkcfg.size_max = 0; |
Markus Armbruster | f751673 | 2014-10-07 13:59:16 +0200 | [diff] [blame] | 1305 | blkcfg.physical_block_exp = get_physical_block_exp(conf); |
Christoph Hellwig | 9752c37 | 2010-02-10 23:37:25 +0100 | [diff] [blame] | 1306 | blkcfg.alignment_offset = 0; |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1307 | blkcfg.wce = blk_enable_write_cache(s->blk); |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1308 | virtio_stw_p(vdev, &blkcfg.num_queues, s->conf.num_queues); |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1309 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD)) { |
Akihiko Odaki | fb0b154 | 2021-02-25 09:12:39 +0900 | [diff] [blame] | 1310 | uint32_t discard_granularity = conf->discard_granularity; |
| 1311 | if (discard_granularity == -1 || !s->conf.report_discard_granularity) { |
| 1312 | discard_granularity = blk_size; |
| 1313 | } |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1314 | virtio_stl_p(vdev, &blkcfg.max_discard_sectors, |
| 1315 | s->conf.max_discard_sectors); |
| 1316 | virtio_stl_p(vdev, &blkcfg.discard_sector_alignment, |
Akihiko Odaki | fb0b154 | 2021-02-25 09:12:39 +0900 | [diff] [blame] | 1317 | discard_granularity >> BDRV_SECTOR_BITS); |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1318 | /* |
| 1319 | * We support only one segment per request since multiple segments |
| 1320 | * are not widely used and there are no userspace APIs that allow |
| 1321 | * applications to submit multiple segments in a single call. |
| 1322 | */ |
| 1323 | virtio_stl_p(vdev, &blkcfg.max_discard_seg, 1); |
| 1324 | } |
| 1325 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES)) { |
| 1326 | virtio_stl_p(vdev, &blkcfg.max_write_zeroes_sectors, |
| 1327 | s->conf.max_write_zeroes_sectors); |
| 1328 | blkcfg.write_zeroes_may_unmap = 1; |
| 1329 | virtio_stl_p(vdev, &blkcfg.max_write_zeroes_seg, 1); |
| 1330 | } |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 1331 | if (bs->bl.zoned != BLK_Z_NONE) { |
| 1332 | switch (bs->bl.zoned) { |
| 1333 | case BLK_Z_HM: |
| 1334 | blkcfg.zoned.model = VIRTIO_BLK_Z_HM; |
| 1335 | break; |
| 1336 | case BLK_Z_HA: |
| 1337 | blkcfg.zoned.model = VIRTIO_BLK_Z_HA; |
| 1338 | break; |
| 1339 | default: |
| 1340 | g_assert_not_reached(); |
| 1341 | } |
| 1342 | |
| 1343 | virtio_stl_p(vdev, &blkcfg.zoned.zone_sectors, |
| 1344 | bs->bl.zone_size / 512); |
| 1345 | virtio_stl_p(vdev, &blkcfg.zoned.max_active_zones, |
| 1346 | bs->bl.max_active_zones); |
| 1347 | virtio_stl_p(vdev, &blkcfg.zoned.max_open_zones, |
| 1348 | bs->bl.max_open_zones); |
| 1349 | virtio_stl_p(vdev, &blkcfg.zoned.write_granularity, blk_size); |
| 1350 | virtio_stl_p(vdev, &blkcfg.zoned.max_append_sectors, |
| 1351 | bs->bl.max_append_sectors); |
| 1352 | } else { |
| 1353 | blkcfg.zoned.model = VIRTIO_BLK_Z_NONE; |
| 1354 | } |
Stefano Garzarella | 20764be | 2019-02-21 11:33:09 +0100 | [diff] [blame] | 1355 | memcpy(config, &blkcfg, s->config_size); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1356 | } |
| 1357 | |
Paolo Bonzini | 13e3dce | 2012-08-09 16:07:19 +0200 | [diff] [blame] | 1358 | static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) |
| 1359 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1360 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Paolo Bonzini | 13e3dce | 2012-08-09 16:07:19 +0200 | [diff] [blame] | 1361 | struct virtio_blk_config blkcfg; |
| 1362 | |
Stefano Garzarella | 20764be | 2019-02-21 11:33:09 +0100 | [diff] [blame] | 1363 | memcpy(&blkcfg, config, s->config_size); |
Fam Zheng | 6d7e73d | 2014-05-15 19:22:06 +0800 | [diff] [blame] | 1364 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1365 | aio_context_acquire(blk_get_aio_context(s->blk)); |
| 1366 | blk_set_enable_write_cache(s->blk, blkcfg.wce != 0); |
| 1367 | aio_context_release(blk_get_aio_context(s->blk)); |
Paolo Bonzini | 13e3dce | 2012-08-09 16:07:19 +0200 | [diff] [blame] | 1368 | } |
| 1369 | |
Jason Wang | 9d5b731 | 2015-07-27 17:49:19 +0800 | [diff] [blame] | 1370 | static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features, |
| 1371 | Error **errp) |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1372 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1373 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 1374 | |
Stefano Garzarella | bbe8bd4 | 2019-02-21 11:33:06 +0100 | [diff] [blame] | 1375 | /* Firstly sync all virtio-blk possible supported features */ |
| 1376 | features |= s->host_features; |
| 1377 | |
Cornelia Huck | 0cd09c3 | 2014-12-11 14:25:05 +0100 | [diff] [blame] | 1378 | virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX); |
| 1379 | virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); |
| 1380 | virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); |
| 1381 | virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); |
Cornelia Huck | 95129d6 | 2015-08-17 11:48:29 +0200 | [diff] [blame] | 1382 | if (virtio_has_feature(features, VIRTIO_F_VERSION_1)) { |
Stefano Garzarella | bbe8bd4 | 2019-02-21 11:33:06 +0100 | [diff] [blame] | 1383 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_SCSI)) { |
Jason Wang | efb8206 | 2015-07-27 17:49:20 +0800 | [diff] [blame] | 1384 | error_setg(errp, "Please set scsi=off for virtio-blk devices in order to use virtio 1.0"); |
| 1385 | return 0; |
| 1386 | } |
Jason Wang | efb8206 | 2015-07-27 17:49:20 +0800 | [diff] [blame] | 1387 | } else { |
Jason Wang | c9b11f9 | 2015-07-27 17:49:21 +0800 | [diff] [blame] | 1388 | virtio_clear_feature(&features, VIRTIO_F_ANY_LAYOUT); |
Jason Wang | efb8206 | 2015-07-27 17:49:20 +0800 | [diff] [blame] | 1389 | virtio_add_feature(&features, VIRTIO_BLK_F_SCSI); |
| 1390 | } |
Christoph Hellwig | aa659be | 2009-09-04 19:02:23 +0200 | [diff] [blame] | 1391 | |
Evgeny Yakovlev | 5f25857 | 2019-11-05 21:22:17 +0300 | [diff] [blame] | 1392 | if (blk_enable_write_cache(s->blk) || |
| 1393 | (s->conf.x_enable_wce_if_config_wce && |
| 1394 | virtio_has_feature(features, VIRTIO_BLK_F_CONFIG_WCE))) { |
Cornelia Huck | 0cd09c3 | 2014-12-11 14:25:05 +0100 | [diff] [blame] | 1395 | virtio_add_feature(&features, VIRTIO_BLK_F_WCE); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1396 | } |
Kevin Wolf | 86b1cf3 | 2021-01-18 13:34:47 +0100 | [diff] [blame] | 1397 | if (!blk_is_writable(s->blk)) { |
Cornelia Huck | 0cd09c3 | 2014-12-11 14:25:05 +0100 | [diff] [blame] | 1398 | virtio_add_feature(&features, VIRTIO_BLK_F_RO); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1399 | } |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1400 | if (s->conf.num_queues > 1) { |
| 1401 | virtio_add_feature(&features, VIRTIO_BLK_F_MQ); |
| 1402 | } |
Christoph Hellwig | 1063b8b | 2009-04-27 10:29:14 +0200 | [diff] [blame] | 1403 | |
| 1404 | return features; |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1405 | } |
| 1406 | |
Paolo Bonzini | 9315cbf | 2012-08-09 16:07:20 +0200 | [diff] [blame] | 1407 | static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) |
| 1408 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1409 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Paolo Bonzini | 9315cbf | 2012-08-09 16:07:20 +0200 | [diff] [blame] | 1410 | |
Paolo Bonzini | 9ffe337 | 2016-10-21 22:48:09 +0200 | [diff] [blame] | 1411 | if (!(status & (VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK))) { |
| 1412 | assert(!s->dataplane_started); |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1413 | } |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1414 | |
Paolo Bonzini | 9315cbf | 2012-08-09 16:07:20 +0200 | [diff] [blame] | 1415 | if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
| 1416 | return; |
| 1417 | } |
| 1418 | |
Paolo Bonzini | ef5bc96 | 2013-09-20 17:31:55 +0200 | [diff] [blame] | 1419 | /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send |
| 1420 | * cache flushes. Thus, the "auto writethrough" behavior is never |
| 1421 | * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature. |
| 1422 | * Leaving it enabled would break the following sequence: |
| 1423 | * |
| 1424 | * Guest started with "-drive cache=writethrough" |
| 1425 | * Guest sets status to 0 |
| 1426 | * Guest sets DRIVER bit in status field |
| 1427 | * Guest reads host features (WCE=0, CONFIG_WCE=1) |
| 1428 | * Guest writes guest features (WCE=0, CONFIG_WCE=1) |
| 1429 | * Guest writes 1 to the WCE configuration field (writeback mode) |
| 1430 | * Guest sets DRIVER_OK bit in status field |
| 1431 | * |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1432 | * s->blk would erroneously be placed in writethrough mode. |
Paolo Bonzini | ef5bc96 | 2013-09-20 17:31:55 +0200 | [diff] [blame] | 1433 | */ |
Cornelia Huck | 95129d6 | 2015-08-17 11:48:29 +0200 | [diff] [blame] | 1434 | if (!virtio_vdev_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE)) { |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1435 | aio_context_acquire(blk_get_aio_context(s->blk)); |
| 1436 | blk_set_enable_write_cache(s->blk, |
Cornelia Huck | 95129d6 | 2015-08-17 11:48:29 +0200 | [diff] [blame] | 1437 | virtio_vdev_has_feature(vdev, |
| 1438 | VIRTIO_BLK_F_WCE)); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1439 | aio_context_release(blk_get_aio_context(s->blk)); |
Paolo Bonzini | ef5bc96 | 2013-09-20 17:31:55 +0200 | [diff] [blame] | 1440 | } |
Paolo Bonzini | 9315cbf | 2012-08-09 16:07:20 +0200 | [diff] [blame] | 1441 | } |
| 1442 | |
Greg Kurz | b2b295a | 2014-06-24 19:19:23 +0200 | [diff] [blame] | 1443 | static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f) |
| 1444 | { |
| 1445 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
| 1446 | VirtIOBlockReq *req = s->rq; |
| 1447 | |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1448 | while (req) { |
| 1449 | qemu_put_sbyte(f, 1); |
Stefan Hajnoczi | 30d8bf6 | 2016-06-21 13:13:14 +0100 | [diff] [blame] | 1450 | |
| 1451 | if (s->conf.num_queues > 1) { |
| 1452 | qemu_put_be32(f, virtio_get_queue_index(req->vq)); |
| 1453 | } |
| 1454 | |
Jason Wang | 86044b2 | 2019-10-25 10:35:24 +0200 | [diff] [blame] | 1455 | qemu_put_virtqueue_element(vdev, f, &req->elem); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1456 | req = req->next; |
| 1457 | } |
| 1458 | qemu_put_sbyte(f, 0); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1459 | } |
| 1460 | |
Greg Kurz | b2b295a | 2014-06-24 19:19:23 +0200 | [diff] [blame] | 1461 | static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f, |
| 1462 | int version_id) |
| 1463 | { |
| 1464 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
Orit Wassermann | 2a633c4 | 2012-05-16 12:21:35 +0200 | [diff] [blame] | 1465 | |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1466 | while (qemu_get_sbyte(f)) { |
Stefan Hajnoczi | 30d8bf6 | 2016-06-21 13:13:14 +0100 | [diff] [blame] | 1467 | unsigned nvqs = s->conf.num_queues; |
| 1468 | unsigned vq_idx = 0; |
Paolo Bonzini | ab281c1 | 2016-01-31 11:28:59 +0100 | [diff] [blame] | 1469 | VirtIOBlockReq *req; |
Stefan Hajnoczi | 30d8bf6 | 2016-06-21 13:13:14 +0100 | [diff] [blame] | 1470 | |
| 1471 | if (nvqs > 1) { |
| 1472 | vq_idx = qemu_get_be32(f); |
| 1473 | |
| 1474 | if (vq_idx >= nvqs) { |
| 1475 | error_report("Invalid virtqueue index in request list: %#x", |
| 1476 | vq_idx); |
| 1477 | return -EINVAL; |
| 1478 | } |
| 1479 | } |
| 1480 | |
Jason Wang | 8607f5c | 2016-12-30 18:09:10 +0800 | [diff] [blame] | 1481 | req = qemu_get_virtqueue_element(vdev, f, sizeof(VirtIOBlockReq)); |
Stefan Hajnoczi | 30d8bf6 | 2016-06-21 13:13:14 +0100 | [diff] [blame] | 1482 | virtio_blk_init_request(s, virtio_get_queue(vdev, vq_idx), req); |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1483 | req->next = s->rq; |
Yoshiaki Tamura | 20a81e4 | 2010-06-21 17:50:01 +0900 | [diff] [blame] | 1484 | s->rq = req; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1485 | } |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1486 | |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
Sergio Lopez | 9b92fbc | 2019-09-16 13:24:12 +0200 | [diff] [blame] | 1490 | static void virtio_resize_cb(void *opaque) |
| 1491 | { |
| 1492 | VirtIODevice *vdev = opaque; |
| 1493 | |
| 1494 | assert(qemu_get_current_aio_context() == qemu_get_aio_context()); |
| 1495 | virtio_notify_config(vdev); |
| 1496 | } |
| 1497 | |
Markus Armbruster | 145feb1 | 2011-08-03 15:07:42 +0200 | [diff] [blame] | 1498 | static void virtio_blk_resize(void *opaque) |
Christoph Hellwig | e5051fc | 2011-01-24 13:32:51 +0100 | [diff] [blame] | 1499 | { |
KONRAD Frederic | 1cc91b7 | 2013-03-18 17:37:27 +0100 | [diff] [blame] | 1500 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
Christoph Hellwig | e5051fc | 2011-01-24 13:32:51 +0100 | [diff] [blame] | 1501 | |
Sergio Lopez | 9b92fbc | 2019-09-16 13:24:12 +0200 | [diff] [blame] | 1502 | /* |
| 1503 | * virtio_notify_config() needs to acquire the global mutex, |
| 1504 | * so it can't be called from an iothread. Instead, schedule |
| 1505 | * it to be run in the main context BH. |
| 1506 | */ |
| 1507 | aio_bh_schedule_oneshot(qemu_get_aio_context(), virtio_resize_cb, vdev); |
Christoph Hellwig | e5051fc | 2011-01-24 13:32:51 +0100 | [diff] [blame] | 1508 | } |
| 1509 | |
Stefan Hajnoczi | 1665d93 | 2023-05-16 15:02:35 -0400 | [diff] [blame] | 1510 | /* Suspend virtqueue ioeventfd processing during drain */ |
| 1511 | static void virtio_blk_drained_begin(void *opaque) |
| 1512 | { |
| 1513 | VirtIOBlock *s = opaque; |
| 1514 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| 1515 | AioContext *ctx = blk_get_aio_context(s->conf.conf.blk); |
| 1516 | |
| 1517 | if (!s->dataplane || !s->dataplane_started) { |
| 1518 | return; |
| 1519 | } |
| 1520 | |
| 1521 | for (uint16_t i = 0; i < s->conf.num_queues; i++) { |
| 1522 | VirtQueue *vq = virtio_get_queue(vdev, i); |
| 1523 | virtio_queue_aio_detach_host_notifier(vq, ctx); |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | /* Resume virtqueue ioeventfd processing after drain */ |
| 1528 | static void virtio_blk_drained_end(void *opaque) |
| 1529 | { |
| 1530 | VirtIOBlock *s = opaque; |
| 1531 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| 1532 | AioContext *ctx = blk_get_aio_context(s->conf.conf.blk); |
| 1533 | |
| 1534 | if (!s->dataplane || !s->dataplane_started) { |
| 1535 | return; |
| 1536 | } |
| 1537 | |
| 1538 | for (uint16_t i = 0; i < s->conf.num_queues; i++) { |
| 1539 | VirtQueue *vq = virtio_get_queue(vdev, i); |
| 1540 | virtio_queue_aio_attach_host_notifier(vq, ctx); |
| 1541 | } |
| 1542 | } |
| 1543 | |
Markus Armbruster | 0e49de5 | 2011-08-03 15:07:41 +0200 | [diff] [blame] | 1544 | static const BlockDevOps virtio_block_ops = { |
Stefan Hajnoczi | 1665d93 | 2023-05-16 15:02:35 -0400 | [diff] [blame] | 1545 | .resize_cb = virtio_blk_resize, |
| 1546 | .drained_begin = virtio_blk_drained_begin, |
| 1547 | .drained_end = virtio_blk_drained_end, |
Markus Armbruster | 0e49de5 | 2011-08-03 15:07:41 +0200 | [diff] [blame] | 1548 | }; |
| 1549 | |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1550 | static void virtio_blk_device_realize(DeviceState *dev, Error **errp) |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1551 | { |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1552 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
Andreas Färber | 179b417 | 2013-07-30 04:48:15 +0200 | [diff] [blame] | 1553 | VirtIOBlock *s = VIRTIO_BLK(dev); |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1554 | VirtIOBlkConf *conf = &s->conf; |
Andreas Färber | 3ffeeef | 2013-06-07 16:18:50 +0200 | [diff] [blame] | 1555 | Error *err = NULL; |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1556 | unsigned i; |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1557 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1558 | if (!conf->conf.blk) { |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1559 | error_setg(errp, "drive property not set"); |
| 1560 | return; |
Markus Armbruster | d75d25e | 2010-07-06 14:37:43 +0200 | [diff] [blame] | 1561 | } |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1562 | if (!blk_is_inserted(conf->conf.blk)) { |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1563 | error_setg(errp, "Device needs media, but drive is empty"); |
| 1564 | return; |
Markus Armbruster | 98f28ad | 2010-07-06 14:37:44 +0200 | [diff] [blame] | 1565 | } |
Stefan Hajnoczi | 9445e1e | 2020-08-18 15:33:47 +0100 | [diff] [blame] | 1566 | if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) { |
| 1567 | conf->num_queues = 1; |
| 1568 | } |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1569 | if (!conf->num_queues) { |
| 1570 | error_setg(errp, "num-queues property must be larger than 0"); |
| 1571 | return; |
| 1572 | } |
Denis Plotnikov | 1bf8a98 | 2019-12-20 17:09:04 +0300 | [diff] [blame] | 1573 | if (conf->queue_size <= 2) { |
| 1574 | error_setg(errp, "invalid queue-size property (%" PRIu16 "), " |
| 1575 | "must be > 2", conf->queue_size); |
| 1576 | return; |
| 1577 | } |
Mark Kanda | 6040aed | 2017-12-11 09:16:24 -0600 | [diff] [blame] | 1578 | if (!is_power_of_2(conf->queue_size) || |
| 1579 | conf->queue_size > VIRTQUEUE_MAX_SIZE) { |
| 1580 | error_setg(errp, "invalid queue-size property (%" PRIu16 "), " |
| 1581 | "must be a power of 2 (max %d)", |
| 1582 | conf->queue_size, VIRTQUEUE_MAX_SIZE); |
| 1583 | return; |
| 1584 | } |
Markus Armbruster | d75d25e | 2010-07-06 14:37:43 +0200 | [diff] [blame] | 1585 | |
Mao Zhongyi | ceff3e1 | 2017-11-22 11:08:45 +0800 | [diff] [blame] | 1586 | if (!blkconf_apply_backend_options(&conf->conf, |
Kevin Wolf | 86b1cf3 | 2021-01-18 13:34:47 +0100 | [diff] [blame] | 1587 | !blk_supports_write_perm(conf->conf.blk), |
| 1588 | true, errp)) { |
Kevin Wolf | a17c17a | 2017-01-24 13:43:31 +0100 | [diff] [blame] | 1589 | return; |
| 1590 | } |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1591 | s->original_wce = blk_enable_write_cache(conf->conf.blk); |
Mao Zhongyi | ceff3e1 | 2017-11-22 11:08:45 +0800 | [diff] [blame] | 1592 | if (!blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, errp)) { |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1593 | return; |
Markus Armbruster | b7eb0c9 | 2012-07-11 15:08:39 +0200 | [diff] [blame] | 1594 | } |
Mao Zhongyi | ceff3e1 | 2017-11-22 11:08:45 +0800 | [diff] [blame] | 1595 | |
Roman Kagan | c56ee92 | 2020-05-29 01:55:10 +0300 | [diff] [blame] | 1596 | if (!blkconf_blocksizes(&conf->conf, errp)) { |
Mark Kanda | 0a75b60 | 2017-12-11 09:16:25 -0600 | [diff] [blame] | 1597 | return; |
| 1598 | } |
| 1599 | |
Sam Li | 4f73665 | 2023-05-08 13:19:13 +0800 | [diff] [blame] | 1600 | BlockDriverState *bs = blk_bs(conf->conf.blk); |
| 1601 | if (bs->bl.zoned != BLK_Z_NONE) { |
| 1602 | virtio_add_feature(&s->host_features, VIRTIO_BLK_F_ZONED); |
| 1603 | if (bs->bl.zoned == BLK_Z_HM) { |
| 1604 | virtio_clear_feature(&s->host_features, VIRTIO_BLK_F_DISCARD); |
| 1605 | } |
| 1606 | } |
| 1607 | |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1608 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD) && |
| 1609 | (!conf->max_discard_sectors || |
| 1610 | conf->max_discard_sectors > BDRV_REQUEST_MAX_SECTORS)) { |
| 1611 | error_setg(errp, "invalid max-discard-sectors property (%" PRIu32 ")" |
| 1612 | ", must be between 1 and %d", |
| 1613 | conf->max_discard_sectors, (int)BDRV_REQUEST_MAX_SECTORS); |
| 1614 | return; |
| 1615 | } |
| 1616 | |
| 1617 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES) && |
| 1618 | (!conf->max_write_zeroes_sectors || |
| 1619 | conf->max_write_zeroes_sectors > BDRV_REQUEST_MAX_SECTORS)) { |
| 1620 | error_setg(errp, "invalid max-write-zeroes-sectors property (%" PRIu32 |
| 1621 | "), must be between 1 and %d", |
| 1622 | conf->max_write_zeroes_sectors, |
| 1623 | (int)BDRV_REQUEST_MAX_SECTORS); |
| 1624 | return; |
| 1625 | } |
| 1626 | |
Daniil Tatianin | d9cf55a | 2022-09-06 10:31:08 +0300 | [diff] [blame] | 1627 | s->config_size = virtio_get_config_size(&virtio_blk_cfg_size_params, |
Daniil Tatianin | d74c30c | 2022-09-06 10:31:07 +0300 | [diff] [blame] | 1628 | s->host_features); |
Jonah Palmer | 3857cd5 | 2022-04-01 09:23:18 -0400 | [diff] [blame] | 1629 | virtio_init(vdev, VIRTIO_ID_BLOCK, s->config_size); |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1630 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1631 | s->blk = conf->conf.blk; |
aliguori | 869a5c6 | 2009-01-22 19:52:25 +0000 | [diff] [blame] | 1632 | s->rq = NULL; |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1633 | s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1; |
Markus Armbruster | e63e7fd | 2012-07-10 11:12:43 +0200 | [diff] [blame] | 1634 | |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1635 | for (i = 0; i < conf->num_queues; i++) { |
Mark Kanda | 6040aed | 2017-12-11 09:16:24 -0600 | [diff] [blame] | 1636 | virtio_add_queue(vdev, conf->queue_size, virtio_blk_handle_output); |
Stefan Hajnoczi | 2f27059 | 2016-06-21 13:13:16 +0100 | [diff] [blame] | 1637 | } |
Kevin Wolf | 98e3ab3 | 2022-05-10 17:10:19 +0200 | [diff] [blame] | 1638 | qemu_coroutine_inc_pool_size(conf->num_queues * conf->queue_size / 2); |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1639 | virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err); |
Andreas Färber | 3ffeeef | 2013-06-07 16:18:50 +0200 | [diff] [blame] | 1640 | if (err != NULL) { |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1641 | error_propagate(errp, err); |
Pan Nengyuan | cfaf757 | 2020-03-28 08:57:04 +0800 | [diff] [blame] | 1642 | for (i = 0; i < conf->num_queues; i++) { |
| 1643 | virtio_del_queue(vdev, i); |
| 1644 | } |
KONRAD Frederic | 6a1a8cc | 2013-04-24 10:21:22 +0200 | [diff] [blame] | 1645 | virtio_cleanup(vdev); |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1646 | return; |
Stefan Hajnoczi | 392808b | 2012-11-14 15:45:38 +0100 | [diff] [blame] | 1647 | } |
aliguori | 6e02c38 | 2008-12-04 19:52:44 +0000 | [diff] [blame] | 1648 | |
Stefan Hajnoczi | a937f8e | 2022-11-02 14:23:37 -0400 | [diff] [blame] | 1649 | /* |
| 1650 | * This must be after virtio_init() so virtio_blk_dma_restart_cb() gets |
| 1651 | * called after ->start_ioeventfd() has already set blk's AioContext. |
| 1652 | */ |
| 1653 | s->change = |
| 1654 | qdev_add_vm_change_state_handler(dev, virtio_blk_dma_restart_cb, s); |
| 1655 | |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 1656 | blk_ram_registrar_init(&s->blk_ram_registrar, s->blk); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1657 | blk_set_dev_ops(s->blk, &virtio_block_ops, s); |
Paul Brook | 07e3af9 | 2009-05-14 22:35:08 +0100 | [diff] [blame] | 1658 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1659 | blk_iostatus_enable(s->blk); |
Sam Eiderman | 71f571a | 2019-10-16 19:41:42 +0300 | [diff] [blame] | 1660 | |
| 1661 | add_boot_device_lchs(dev, "/disk@0,0", |
| 1662 | conf->conf.lcyls, |
| 1663 | conf->conf.lheads, |
| 1664 | conf->conf.lsecs); |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1665 | } |
| 1666 | |
Markus Armbruster | b69c3c2 | 2020-05-05 17:29:24 +0200 | [diff] [blame] | 1667 | static void virtio_blk_device_unrealize(DeviceState *dev) |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1668 | { |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 1669 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| 1670 | VirtIOBlock *s = VIRTIO_BLK(dev); |
Eugenio Pérez | 4a0117c | 2019-10-25 10:35:22 +0200 | [diff] [blame] | 1671 | VirtIOBlkConf *conf = &s->conf; |
| 1672 | unsigned i; |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 1673 | |
Julia Suvorova | 7bfde68 | 2019-10-18 16:28:56 +0200 | [diff] [blame] | 1674 | blk_drain(s->blk); |
Sam Eiderman | 71f571a | 2019-10-16 19:41:42 +0300 | [diff] [blame] | 1675 | del_boot_device_lchs(dev, "/disk@0,0"); |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1676 | virtio_blk_data_plane_destroy(s->dataplane); |
| 1677 | s->dataplane = NULL; |
Eugenio Pérez | 4a0117c | 2019-10-25 10:35:22 +0200 | [diff] [blame] | 1678 | for (i = 0; i < conf->num_queues; i++) { |
| 1679 | virtio_del_queue(vdev, i); |
| 1680 | } |
Kevin Wolf | 98e3ab3 | 2022-05-10 17:10:19 +0200 | [diff] [blame] | 1681 | qemu_coroutine_dec_pool_size(conf->num_queues * conf->queue_size / 2); |
Stefan Hajnoczi | baf4226 | 2022-10-13 14:59:08 -0400 | [diff] [blame] | 1682 | blk_ram_registrar_destroy(&s->blk_ram_registrar); |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1683 | qemu_del_vm_change_state_handler(s->change); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 1684 | blockdev_mark_auto_del(s->blk); |
KONRAD Frederic | 6a1a8cc | 2013-04-24 10:21:22 +0200 | [diff] [blame] | 1685 | virtio_cleanup(vdev); |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1686 | } |
| 1687 | |
Stefan Hajnoczi | 467b3f3 | 2014-06-10 09:03:20 +0200 | [diff] [blame] | 1688 | static void virtio_blk_instance_init(Object *obj) |
| 1689 | { |
| 1690 | VirtIOBlock *s = VIRTIO_BLK(obj); |
| 1691 | |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1692 | device_add_bootindex_property(obj, &s->conf.conf.bootindex, |
Gonglei | 3342ec3 | 2014-10-07 16:00:30 +0800 | [diff] [blame] | 1693 | "bootindex", "/disk@0,0", |
Markus Armbruster | 40c2281 | 2020-05-05 17:29:23 +0200 | [diff] [blame] | 1694 | DEVICE(obj)); |
Stefan Hajnoczi | 467b3f3 | 2014-06-10 09:03:20 +0200 | [diff] [blame] | 1695 | } |
| 1696 | |
Halil Pasic | 977a117 | 2016-10-06 14:55:40 +0200 | [diff] [blame] | 1697 | static const VMStateDescription vmstate_virtio_blk = { |
| 1698 | .name = "virtio-blk", |
| 1699 | .minimum_version_id = 2, |
| 1700 | .version_id = 2, |
| 1701 | .fields = (VMStateField[]) { |
| 1702 | VMSTATE_VIRTIO_DEVICE, |
| 1703 | VMSTATE_END_OF_LIST() |
| 1704 | }, |
| 1705 | }; |
Dr. David Alan Gilbert | bbded32 | 2016-07-14 18:22:47 +0100 | [diff] [blame] | 1706 | |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1707 | static Property virtio_blk_properties[] = { |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1708 | DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf), |
Kevin Wolf | 8c39825 | 2016-06-29 17:41:35 +0200 | [diff] [blame] | 1709 | DEFINE_BLOCK_ERROR_PROPERTIES(VirtIOBlock, conf.conf), |
Markus Armbruster | 2a30307 | 2014-10-07 13:59:17 +0200 | [diff] [blame] | 1710 | DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, conf.conf), |
| 1711 | DEFINE_PROP_STRING("serial", VirtIOBlock, conf.serial), |
Stefano Garzarella | bbe8bd4 | 2019-02-21 11:33:06 +0100 | [diff] [blame] | 1712 | DEFINE_PROP_BIT64("config-wce", VirtIOBlock, host_features, |
| 1713 | VIRTIO_BLK_F_CONFIG_WCE, true), |
Stefan Hajnoczi | 32a877e | 2014-06-18 17:58:36 +0800 | [diff] [blame] | 1714 | #ifdef __linux__ |
Stefano Garzarella | bbe8bd4 | 2019-02-21 11:33:06 +0100 | [diff] [blame] | 1715 | DEFINE_PROP_BIT64("scsi", VirtIOBlock, host_features, |
| 1716 | VIRTIO_BLK_F_SCSI, false), |
Stefan Hajnoczi | 32a877e | 2014-06-18 17:58:36 +0800 | [diff] [blame] | 1717 | #endif |
Peter Lieven | c99495a | 2015-02-02 14:52:22 +0100 | [diff] [blame] | 1718 | DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0, |
| 1719 | true), |
Stefan Hajnoczi | 9445e1e | 2020-08-18 15:33:47 +0100 | [diff] [blame] | 1720 | DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues, |
| 1721 | VIRTIO_BLK_AUTO_NUM_QUEUES), |
Denis Plotnikov | c9b7d9e | 2020-02-14 10:46:48 +0300 | [diff] [blame] | 1722 | DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 256), |
Denis Plotnikov | 1bf8a98 | 2019-12-20 17:09:04 +0300 | [diff] [blame] | 1723 | DEFINE_PROP_BOOL("seg-max-adjust", VirtIOBlock, conf.seg_max_adjust, true), |
Fam Zheng | d679ac0 | 2017-07-14 10:14:55 +0800 | [diff] [blame] | 1724 | DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD, |
| 1725 | IOThread *), |
Stefano Garzarella | 5c81161 | 2019-02-21 11:33:07 +0100 | [diff] [blame] | 1726 | DEFINE_PROP_BIT64("discard", VirtIOBlock, host_features, |
| 1727 | VIRTIO_BLK_F_DISCARD, true), |
Akihiko Odaki | fb0b154 | 2021-02-25 09:12:39 +0900 | [diff] [blame] | 1728 | DEFINE_PROP_BOOL("report-discard-granularity", VirtIOBlock, |
| 1729 | conf.report_discard_granularity, true), |
Stefano Garzarella | 5c81161 | 2019-02-21 11:33:07 +0100 | [diff] [blame] | 1730 | DEFINE_PROP_BIT64("write-zeroes", VirtIOBlock, host_features, |
| 1731 | VIRTIO_BLK_F_WRITE_ZEROES, true), |
Stefano Garzarella | 37b06f8 | 2019-02-21 11:33:10 +0100 | [diff] [blame] | 1732 | DEFINE_PROP_UINT32("max-discard-sectors", VirtIOBlock, |
| 1733 | conf.max_discard_sectors, BDRV_REQUEST_MAX_SECTORS), |
| 1734 | DEFINE_PROP_UINT32("max-write-zeroes-sectors", VirtIOBlock, |
| 1735 | conf.max_write_zeroes_sectors, BDRV_REQUEST_MAX_SECTORS), |
Evgeny Yakovlev | 5f25857 | 2019-11-05 21:22:17 +0300 | [diff] [blame] | 1736 | DEFINE_PROP_BOOL("x-enable-wce-if-config-wce", VirtIOBlock, |
| 1737 | conf.x_enable_wce_if_config_wce, true), |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1738 | DEFINE_PROP_END_OF_LIST(), |
| 1739 | }; |
| 1740 | |
| 1741 | static void virtio_blk_class_init(ObjectClass *klass, void *data) |
| 1742 | { |
| 1743 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 1744 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1745 | |
Marc-André Lureau | 4f67d30 | 2020-01-10 19:30:32 +0400 | [diff] [blame] | 1746 | device_class_set_props(dc, virtio_blk_properties); |
Dr. David Alan Gilbert | bbded32 | 2016-07-14 18:22:47 +0100 | [diff] [blame] | 1747 | dc->vmsd = &vmstate_virtio_blk; |
Marcel Apfelbaum | 125ee0e | 2013-07-29 17:17:45 +0300 | [diff] [blame] | 1748 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
Andreas Färber | 75884af | 2013-07-30 01:35:08 +0200 | [diff] [blame] | 1749 | vdc->realize = virtio_blk_device_realize; |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 1750 | vdc->unrealize = virtio_blk_device_unrealize; |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1751 | vdc->get_config = virtio_blk_update_config; |
| 1752 | vdc->set_config = virtio_blk_set_config; |
| 1753 | vdc->get_features = virtio_blk_get_features; |
| 1754 | vdc->set_status = virtio_blk_set_status; |
| 1755 | vdc->reset = virtio_blk_reset; |
Greg Kurz | b2b295a | 2014-06-24 19:19:23 +0200 | [diff] [blame] | 1756 | vdc->save = virtio_blk_save_device; |
| 1757 | vdc->load = virtio_blk_load_device; |
Paolo Bonzini | 9ffe337 | 2016-10-21 22:48:09 +0200 | [diff] [blame] | 1758 | vdc->start_ioeventfd = virtio_blk_data_plane_start; |
| 1759 | vdc->stop_ioeventfd = virtio_blk_data_plane_stop; |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1760 | } |
| 1761 | |
Changlong Xie | b5c7cea | 2016-08-03 16:49:07 +0800 | [diff] [blame] | 1762 | static const TypeInfo virtio_blk_info = { |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1763 | .name = TYPE_VIRTIO_BLK, |
| 1764 | .parent = TYPE_VIRTIO_DEVICE, |
| 1765 | .instance_size = sizeof(VirtIOBlock), |
Stefan Hajnoczi | 467b3f3 | 2014-06-10 09:03:20 +0200 | [diff] [blame] | 1766 | .instance_init = virtio_blk_instance_init, |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1767 | .class_init = virtio_blk_class_init, |
| 1768 | }; |
| 1769 | |
| 1770 | static void virtio_register_types(void) |
| 1771 | { |
Changlong Xie | b5c7cea | 2016-08-03 16:49:07 +0800 | [diff] [blame] | 1772 | type_register_static(&virtio_blk_info); |
KONRAD Frederic | 1c028dd | 2013-03-18 17:37:22 +0100 | [diff] [blame] | 1773 | } |
| 1774 | |
| 1775 | type_init(virtio_register_types) |